exam😡 Flashcards
investigation aim
is the purpose of the study
hypothesis template
it is hypothesised IV experimental group, lowered or increased the DV compared to IV control group
hypothesis example
it is hypothesised that children who consume sugar will have lowered level of attention compared with those who do not consume sugar
independant variable
the variable that is being manipulated by the researcher
(cause of the change)
dependant variable
result of the change
operationalising the iv and dv
involves defining how they will be manipulated or measured in the experiment
be specific
controlled experiment
is an investigation methodology that aims to test the effects of an IV snd DV, with all other variables controlled
extraneous variables
variables other then the independant variable that may have unwanted effect on the dependant variable and results
examples of extraneous variables
age, sex, personality
difference in temp, noise level light level
controlled variables
variables that are held constant to ensure that only influence on the dependant variable is the independant variable
example of controlled variable
in a study effecting caffeine on subjects time reaction to imaging, they should control the vision impairment, comfort levels and screen brightness bc these are potential extraneous variables
confounding variables
unwanted variables that affect the DV and the results in an investigation and it cannot be determined whether the IV or the confounding variable cause the change
population
a population of interest is the wider group of people that a study is investigating
sample
the smaller group of people selected from the population who will be participants in the investigation
stratified sampling
is where the population is first divided into subgroups, and participants are randomly selected from each subgroup, in the proportion that they appear in the population
random sampling
involves selecting participants from the population in such a way that each member has an equal chance of being selected to participate in the study
strengths of random sampling
large enough random sampling likely to be representative of the population, improving external validity
limitations of random sampling
small random sampling may not be representative of the population, reducing external validity
what are the eight investigation methodologies
case study
classification and identification
controlled experiment
correlational study
fieldwork
literature review
modelling and simulation
product, process or system development
what occurs in controlled experiments
participants are randomly allocated to an experimental group and the results of the groups are then compared
what is the aim of a controlled experiment
to find whether an IV has an affect on the DV
what two groups are allocated in a control experiment
experimental group and control group
what is an experimental group (controlled experiment)
is exposed to the independant variable and receives experimental treatment
what is an control group (controlled experiment)
forms a baseline to compare with the experimental group. Members of the control group participate in the control conditions and are not exposed to the IV and do no receives experimental treatment
what are strengths of a controlled experiment
-controlled experiments can identify a cause and effect relationship between an IV and a DV
-controlled experiments can be repeated to gather more data and test reliability of results
what are limitations of a controlled experiment
-controlled experiments require strictly controlled conditions, which are difficult to maintain, results may be influenced by extraneous variables
-may be unethical or impossible to conduct a controlled experiment on a particular variable
investigation method: controlled experiment allocation
-participants from the sample are divided into two groups
investigation method-controlled experiment
choosing a experimental design
(investigation designs)
between subjects design
within subjects design
mixed design
between subjects design
when participants are randomly allocated to either the control or experimental condition
1st strength of between subjects design
-most time efficient because both groups can be tested at the same time and no pre testing is required
2nd strength of between subjects design
it has a lower rate of participant withdrawal then a within subjects design because participants only complete one condition
1st limitation of between subjects design
more participants are needed in a between subjects design than a within subjects design
2nd limitation of between subjects design
their is less control over the extraneous variable of the participant variables between groups, which may influence results in an unwanted way
within subjects design
involves all participants in the sample completing both the experimental and control conditions
1st strength of within subjects design
their is no extraneous variable of participant variables between groups, improving validity
2nd strength of within subjects design
fewer participants are needed than in a between subjects design
1st limitation of within subjects design
their is less control over participant knowledge of the study. The extraneous variables of prior participation in the first condition may influence their behaviour while completing the second condition
2nd limitation of within subjects design
it is more time consuming than a between subjects design because both conditions cannot be tested at the same time
mixed design
involves a combination between subjects design and within subjects design
-may also involves two independant variables
1st strength of mixed design
differences in participant variables between groups are controlled within subjects design elements
2nd strength of mixed design
can test effect of multiple IV’s on a DV in one investigation
1st limitation os a mixed design
their is higher rate of participant withdrawal from the study then using between subject design
2nd limitation of mixed design
their is less control over participant knowledge of the study. Prior to participation in the first condition may influence their behaviour while completing the second condition
investigation method: case study
an investigation of particular activity, behaviour, event or problem that contains a real or hypothetical situation
what can a case study be
historical
involve real situation
based on problem solving where developing new design or methodology
what are the strengths of a case study
they can provide rich qualitative data
-they can act as a basis for further research
what are limitations of case studies
-they may not be repeatable to gain more data or to test reliability of results
-they are typically time consuming
investigation method: classification and identification
-involves arranging phenomena, objects or events into manageable sets, and recognising phenomena as belonging to a particular part of a new set
classification and identification strengths
-classifications can allow for a narrowed focus on research
-using classifications can allow for efficient processing of large amounts of info
what are limitations of classification and identification
-classifications may be based on subjective criteria
-large amounts of information are required to create classifications
investigation method: correlational method
involved planned observation and recording of events and behaviours that have not been manipulated or controlled in order to understand the relationships or associations exisiting between variables
what can correlational NOT do
cannot find how changing one variable causes a change in another variable and therefore a cause and effect relationship is not found
what are strengths of a correlational study
the direction and strength of a relationship between variables can be determined using a correlational study
-secondary data can be used
what is the 1st limitation of a correlational study
-does not equal or imply causation, so even if a strong relationship is determined, you cannot assume that one variable causes a change in the other
what is the second limitation to correlational studies
a large amount of data is recquired
investigation method: fieldwork
involves collecting information by observing and interacting with a selected environment
what are some examples of fieldwork
participant observation: researcher becoming involved in the group studied
qualitative interviews
what are strengths of fieldwork
-information on sensitive topics can be obtained using fieldwork
-natural settings are more likely to show behaviour that reflects real life
what are limitations of fieldwork
-qualitative data can be difficult to summarise
-their are ethical concerns with the lack of informed consent in some cases
investigation method:literature review
involves collating and analysing secondary data findings and/or view points
literature reviews combine theories and results that evaluate a body of literature to answer a research question or provide a starting point for primary collection
how can information be summarised (literature review)
-discussing how knowledge has evolved over time
-acknowledging what research has already been completed
what are strengths of literature reviews
they help introduce exisiting understanding and context for primary research
-they can identify expert researchers in the field
what are limitations of a literature review
-only secondary data is acquired
-may describe multiple studies but lack a deeper analysis of the individual studies
investigation method: modeling and stimulation
involves constructing and/or manipulation a physical or conceptual model of a system
once a model is made, a simulation uses the models to replicate and study behaviour of a real or theoretical system
what are two strengths of modelling and simulation
-modelling can allow for unobservable events to be visualised
-modelling and simulations can test a product before it’s created
what are limitations of modelling and simulation
-complex models and simulations may be expensive
-large amount of valid source of data may be needed in the creation of the models
investigation method: product, process and system development
involves the design of a product a process or system to meet human needs.
these may involves technological application in addition to scientific knowledge
what is an example of process, product and system development
AI-powered chatbots can provide virtual support for our mental wellbeing
ethical concepts in psychological issue
general ethical considerations used to analyse the ethical and moral aspects of conduct surrounding psychological issues and psychological investigations
what are five ethical considerations
integrity
justice
non-maleficence
beneficence
respect
ethical concept: integrity
involves the commitment to searching for knowledge and understanding and the honest reporting of all sources of information and results
detail in integrity
whether the results are favourable or unfavourable to the initial intentions of a study, a researcher has an obligation to report them truthfully in a way that permits scrutiny and contributes to public knowledge and understanding
ethical concept: justice
involves the moral obligation to ensure that competing claims are considered fairly that they is no unfair burden on a particular groups from an action and that their is fair distribution and access to the benefits of the action
justice detail
however treating all people equally is not always fair and therefore justice means ensuring peoples differences are also accounted for
ethical concept: BENEFICENCE and non maleficence
beneficence: is the commitment to maximising benefits and minimising the risks and harm
something of positive value such as contributing to psychological knowledge
ethical concept: beneficence and NON MALEFICENCE
means to avoid causing harm.
-determining a position or conducting scientific research in psychology may lead to a degree in harm resulting from any positions to be scientifically justifiable
how does beneficence and non malificence relate
the two ethical concepts can be considered together, in an understanding that one must act in a manner that promotes benefit to other, while also minimising harm to others
ethical concepts: respect
involves considering the value of living things: giving due regard and considering the capacity of living things to make their own decisions
ethical guidelines
must follow guidelines set out by the NHMRC to ensure protection and welfare of all participants in research
ethical guidelines detail
once in investigation, the researcher must follow several additional ethical guidelines that are specifically relevant to research
ethical guidelines: confidentiality
involves ensuring that the participants remain anonymous and their personal information is kept private, protected and secure throughout the study
ethical guideline:voluntary participation
ensures that each participant freely agrees to participate in a study, with no pressure or coercion
it is normal for participants to accept money or compensation
ethical guidelines: informed consent
are conducted before a study begins, where participants agree to participate in the research after they have received all the details of the investigation, including nature and purpose, methods of data and potential risks
ethical guidelines: debriefing
is condcted at the end of the study and is when particpants are informed of the true aim, results and conclusions of the study
what does debriefing include
answering any questions
clarifying misunderstandings or deception
providing support to ensure no lasting harm occurs to partcipants
ethical guidelines: use of deception in research
involves withholding the true of nature of the study from participants if their knowledge of the true purpose may affect their behaviour and the subsequent validity
primary data
is the collected through the first hand experience for an internal purpose: for example a researcher using a questionnaire to conduct their own study
secondary data
is obtained through second hand research conducted or data collected by another person for another purpose
-may be used when not possible to use primary bc of costs and time
what are the two types of data
qualitative and quantitive
qualitive data
describes characteristics and qualities
can be in a form of words, photos, videos and audios
quantitive data
involves measurable values and quantities and can be compared on a numerical scale.
can be in a form of measurements such as length weight or time
how can you process quantitive data
percentage
measuring of central tendency
measures of variability
percentage change
a calculation of the degree of change in a values over time
measures of central tendency
category of statistics that describe the central value of a set of data
central of tendency: mean
the average value of a set of data. It represents a typical, central value and gives an overall idea of a data set
central of tendency: median
is the middle value in an ordered set of data. Is the values that splits the set of data in half
central of tendency: mode
is the value that occurs most frequently within a set of data
measures of variability
category of statistics that describe the distribution of data
the standard deviation
shows the spread of the data around the mean
organising and presenting data
charts and graphs
tables
analysing the quality of the data
true value
accuracy
precision
repeatability
reproducibility
validity
true value
is the value or range of values that would be found if the quantity could be measured perfectly
-obtaining a true value would require no error to occur when using instruments to take measurements
accuracy
relates to how close a measurement is to the true value of the quantity being measured
precision
refers to how close a set of measurement values are to each other
describes how a exact measurement is and how much a value is consistent within a set of values
repeatability
how close a successive measurement of the same quantity are when carried out under the same conditions
helps verify researcher findings
reproducibility
is how close a measurement of the same quantity are when carried out under different conditions
validity
refers to whether a measurement measures what is it and supposed to be measuring
what are the two types of validity
internal and external
internal validity
refers to a study investigation what it sets out or clean to investigate
external validity
refers to whether the results of the research can be applied to similar individuals in a different setting
how many errors are there
personal errors
measurement errors
systematic erros
random errors
uncertainty
outliers
personal errors
include mistakes, miscalculations and observer errors made when conduction research
measurement errors
is the difference between the measured value and the true value of what is being measured
systematic errors
affect the accuracy of a measurement by causing readings to differ from the true value by a consistent amount
random errors
affect the precision of a measurement by creating unpredictable variations in the measurement process
opinion
a judgement that is not necessarily based on proof
antecdote
a short personal account for an event
analysing and evaluating scientific ideas
distinguish between evidence, opinions and anecdote
evaluate the process used
what do add in a conclusion
limitations of conclusion and implications
limitations of conclusions
the faults or flaws in the degins of an investigation that may limit the conclusions of the investigations
implications
the impact a study might have on the population relevant theory and future research
scientific report
a report outlining why and how some research was conducted with an analysis of the findings
abstract
a section of scientific report that is a concise summary of the whole investigation
introduction section
a section of a scientific report or poster that provides an overview of what the investigation is trying to achieve and why it is important
mothodology section
section of the scientific report that describes participants, material and procedures used in the study
results section
a section that outlines the evidence and findings and concludes the research
discussion section
section of poster or report that analysis the findings and concludes the research
central nervous system
the brain and spinal cord; processes and coordinates responses to sensory stimuli
CNS detail
integrates and coordinated all incoming sensory information and initiates outgoing motor messages to be sent to the body
these can be un/conscious
voluntary and unvolvuntary
what are the three main functions of our nervous system
receive information
process information
coordination a response to information
brain
processes info received through neural pathways from the body, receives and analysis sensory information, controls all bodily action and functions
how does the brain communicate with the body
via the spinal cord and its nerves as well as cranial nerves that connect the brain directly to various organs and muscles of the body
nervous sytem processes
brain is kept informed of the ever changing external and internal environments of the body through sensory information received by receptor cells around the body
the spinal cord
def- think bundle of nerve tissue that runs from the brainstem to the lower middle section of the spine
spinal cord detail
allows the brain to communicate with the rest of the body conveying messages from the brain to the PNS and vice versa
what is the 1st major function of the spinal cord
receive sensory information from the body via the PNS and send to the brain for processing
what is the 2nd major function of the spinal cord
receive motor information from the brain and send it to the body via the PNS to control muscle, glands and organs
what occurs to the spinal cord if it gets damaged
if severed, the somatic nervous system below the point of severance becomes paralysed because of the bridge between the CNS and the PNS can not be crossed
damage to the spinal cord detail
such damage has permeant consequences because the nerves in the spinal cord can not regnerate
the peripheral nervous system
all the nerves outside of the central nervous system that carry messages between the central nervous system ad muscles, organs and glands throughout the body
the 1st function of the PNS
carries info to the CNS from the bodies muscle, organs and glands (about the internal environment) and from the sensory organs (external environment)
the 2nd function of the PNS
carries info from the CNS to the bodies muscle, organs and glands
what are the two nervous systems relating to the PNS
autonomic and somatic
PNS-the somatic nervous sytem
subdivision of the PNS that carries sensory info to the central nervous system and motor information to the body
somatic nervous system sensory function
transmission of information to the brain (CNS) from sensory receptors throughout the body
somatic nervous system motor function
voluntary movement of muscles (skeletal)
PNS- the autonomic system
sub division of the PNS that connects the CNS to the bodies internal organs and glands, providing feedback to the brain about their activities
what are the three sub divisions of the autonomic system
parasympathetic nervous system
sympathetic nervous system
enteric nervous system
sympathetic nervous system
a subdivision of the autonomic nervous system that increases our arousal, readying the body for a quick response and to deal with vigorous activity
sympathetic nervous system detail
activated by stressor or fear stimulus
-enhances survival by producing an immediate response-flight or fight
parasympathetic nervous system
a subdivision of the autonomic nervous system that controls the bodies internal environments in an autonomous or self regulated manner
what is the one main function of the parasympathetic nervous system
maintaining a balanced internal state, otherwise known as homeostasis, including regulation of blood sugar or energy levels
what is the second main function of the Parasympathetic nervous system
counterbalancing the energising function of the sympathetic nervous system by lowering arousal and restoring the body to a calm state after a threat has passes
enteric nervous system
is embedded within the walls of the gastrointestinal tract and is dedicated to its functioning
enteric system in detail
the ENS has extensive, two way connections with the CNS and works together with the CNS to control the digestive system in the context of local and whole body physiological demands
unconscious responses
any response of our nervous system that does not require awareness
unconscious response in detail
it is involuntary, unintentional and automatic ordinarily control its occurence
what are three examples of unconscious responses
blinking
heart rate
digesting our food
conscious responses
any response of the nervous system that requires awareness
conscious response in detail
the reaction, even if momentary is also likely to be goal directed and you will be able to exercise some degree of control over it
a spinal reflex
is an unconscious involuntary and automatically occurring response to certain stimuli without any involvement of the brain
spinal reflex 1st step
- sensory stimulus detected by sensory receptors
spinal reflex 2nd step
sensory neuron’s carry information via sensory afferent pathway to spinal cord
spinal reflex 3rd step
interneurons in spinal cord initiate an involuntary motor movement
spinal reflex 4th step
this is relayed to motor neurons and carried via a motor efferent pathway to muscles
spinal reflex 5th step
muscles perform response without input from the brain
neurotransmitter
is a chemical substance produced by a neuron that carries a message to other neurons or cells in the muscle, organs and other tissue
neurotransmitter detail
when neurons communicate with one another, they do so by sending neurotransmitters across the space between the terminal buttons of one neuron, and the dendrites on the other
neural transmission
an individual nerve cell that is specialised to receive, process and/or transmit information within the nervous system
synapse
the point of communication between two neurons and a target cell, such as a muscle or a gland called a synapse
synaptic vesicle
a membrane bound to sphere filled with neurotransmitter molecules
synaptic gap
the space between the axon terminal of the presynaptic neuron and the membrane of the post synaptic neuron
receptor site
a membrane protein on the dendrites of neurons that receive and detect specific neurotransmitters
what are the 2 effect of neurotransmitters
excitatory
inhibitory
excitatory effect
the increased likelihood that post synaptic neuron will fire an action potential or neural impulse
what is the main excitatory neurotransmitter
glutamate
glutamate
the main excitatory neurotransmitter in the nervous sytsem, which is involved with learning and memory
what does glutamate play an important role in
in learning and the formation of memories in the brain, by stimulating essential structural and functional changes to connections in neurons
what does glutamate do
enhances information transmission by making postsynaptic neurons more likely to fire
inhibitory effect
the decreased likelihood that the post synaptic neuron will fire an action potential or neural impulse
what is the main inhibitory neurontransmitter
Gamma- aminobutyric acid (GABA)
GABA
the main inhibitory neurotransmitter in the nervous system associated with anxiety, specific phobias and parkinsons disease
what occurs when their is in insufficent amount of GABA
activation of post synaptic neurons may get out of control because the excitatory effects of glutamate take over, leading to mental disorders such as anxiety
why does neurotransmitters need to be balanced
too much or too little can be harmful to the functioning of neurons
what is a neuromodulater
a subclass of neurotransmitters that alter the strength of neural transmission, by increasing or decreasing the responsiveness of neurons to neurotransmitter signals
agonists
mimic the effect of a neurotransmitter
e.g a GABA agonist may make it more likely that GAA inhibits neurotransmission
antagonist
slow down the effects of neurotransmitter
e.g a GABA antagonist will reduce its inhibitory effect
what is neuromodulaters role
to alter the neural transmission of neurons by controlling the synthesis and release of the neurotransmitters
what do neuromodulaters not do
they do not release their chemical messengers into a signal synapses. Instead they are released into far broader areas affecting a large number of neurons at once
where is the site of release for neurotransmitters
into the synapse
where is the site of release for neuromodulaters
outside the synapse into the neural tissue in the brain regions
dopamine
a multifunctional neurotransmitter with both excitatory and inhibitory effect, that is involved in many central nervous system such as movement, pleasure, attention, mood, cognition and motivation
why is dopamine considered a neuromodulaters
because it reinforces the neural activity in regions of the brain associated with these functions, for example the reward pathway
reward pathway
a group structure in the brain that are activated by rewarding or reinforcing stimuli
how is dopamine and the reward pathway linked
when we are exposed to rewarding stimuli, the brain increases the release of dopamine, which modulates the brain activity of the structure along with it
what does the reward pathway control
our responses to natural rewards such as food, sex and social interactions
what is the influence of dopamine in thirst and drinking
the gulping motion made by throat as liquid is swallowed sends a message to the brain that water has been consumed
-dopamine release is couple with gulping motion which suggests drinking a learnt behaviour
the influence of dopamine in hunger and eating part 1
the consumption of food release dopamine and gives us feelings of pleasure, therefore increasing our chance of eating food next time we experience hunger
the influence of dopamine in hunger and eating part 2
the brain receives signals from several hormones that indicate when food is needed or not
these signals modify dopamine output from the brains reward pathway, controlling motivation for food
the influence of dopamine in addiction
whenever seeing a reward worth chasing, our brain produces more dopamine, motivating us to complete the task
influence of dopamine in addiction part 2
the dopamine theory suggest that most addictions are caused by the brains inability to produce dopamine naturally without behaviour or the substance that someone is addicted to
seratonin
an inhibitory neurotransmitter that also acts as a neuromodulaters influencing a variety of the brain activities
why is serotonin a modulated
it modulates virtually all human behavioural processes, including mood, perception, reward and anger
the serotonin pathway
serotonins neuromodulatory system, which originated in the brainstem and extends to almost all areas of the cerebellum including the cerebral cortex
what happens if their is damage to the serotonin pathway
impairments to the serotonin pathway system have been linked to anxiety disorders and depression, as well as Parkinson disease
what is the role of serotonin in mood
when serotonin levels are high, mood improves, leads to more calm state
-however their is a lot of other chemical processes happening in the body, so it’s difficult to establish a cause and effect relationship
the role of serotonin in sleep
research generally shows that is the brain lacks serotonin, a person will have reduced pressure to sleep when required, thus increasing restlessness and wakefulness when they should be sleeping
role of serotonin in aggression and impulsivity
low levels of serotonin in the can brain can affect communication between specific structures within the limbic system responsible for regulating emotions
synaptic plasticity
specific changes that occur within the synapses between neurons
what are the two important processes of neural plasticity
long term potentiation
long term depression
what happens when we learn something new relating to synaptic plasticity
when we learn smth new and store a memory of it relatively permanent and stable connection between neurons is formed
what occurs when neurotransmitters are repeatedly activated together
changes the structure of the synapses, strengthening the connection between these two neuron synapses
-when connection is strengthened, more likely to fire together and signals become more efficient
long term potentiation
the relatively permanent strengthening or the synaptic connections as a result of repeated activation of neural pathway
what is the effect of LTP
to improve ability of two neurons to communicate with eachother
long term depression
the relatively permanent weakening of synaptic connection as a result of repeated low level activation
what does LTD result from
lack of stimulation of pre and post synaptic neurons or prolonged low level stimulation
what are the three specific modifications resulting from LTP and LTD
sprouting
rerouting
pruning
sprouting
the growth of axon or dendrite fibres at the synapses
sprouting explanation
the creation of new extensions on a neuron to allow it to make new connection with other neurons, This occurs through the growth of axon or dendrite fibres
rerouting
the formation of new connections between neurons to establish alternative neural pathways
rerouting explanation
new connections are being made between neurons to create alternate neural pathways. These alternate route may be entirely new neural pathways or connections to other pathways in the brain
pruning
the removal of excess neurons and synaptic connections to increase the efficiency of neuronal transmissions
pruning explanation
experience determine which synapses will be retained and strengthened and which will be pruned
dendritic spine
a dendrite fibre that grows by sprouting on the post synaptic neuron
filigree appendage
a fibre that grows by sprouting from the axon terminal of the presynaptic neuron
synaptogensis
the formation of new synapses that result from the process of sprouting
stressor
any event that causes stress or is perceived as a threat and a challenge to our ability to cope
stress
a state of mental, emotional and physiological tension, resulting from a stressor
what are the two processes of stress
psychological and biological
psychological process of stress
includes feelings such as fear, excitement and thoughts such as i can’t cope
biological processes of stress
including physical responses such as increased hr and increased muscle tension
what are the two sources of stress
internal and external
what are two example internal sources of stress
psychological and biological
what are two examples of external sources of stress
environmental and sociocultural
what are example of environment sources of stress
loud noises
extreme temperatures
what are examples of sociocultural sources of stress
daily habits
life events
loss of significant relationships
internal stressor
a cause of stress that originates within an individual can be both psychological and biological and psychological
external stressors
a cause of stress that originates from outside an individual, such as an event or environmental extreme
what can stress be categorised as
acute stress
chronic stress
acute stress
stress that usually occurs because of a sudden threat and only lasts a short time
how can acute stress be beneficial
it can help us deal more effectively with a challenge
-it can also be intense and involve life threatening situations such as being a victim to assault
chronic stress
involves a prolonged and constant feeling of stress
what are features of chronic stress
less intense and severe
generally more detrimental to out health
this can suppress our immune system and increase risk of heart attack
flight or fight or freeze response (acute stress)
an automatic biological response to a perceived stressor that increases out chance of survival in out environment