Final Flashcards
Definition of Psychology
The systematic, scientific study of behaviors and mental processes
What are the goals of psychology?
Describe: describe the various ways that organisms behave in different circumstances
Explain: explain the cause of behavior
Predict: predict how organisms will behave in certain circumstances
Control: control an organisms’s behavior
Major theories that explain problems in functioning
Biological: emphasis on how our genetics and physiology interact with our environments to influence learning, personality, memory, motivation, emotions, and other traits and abilities
Behavioral: studies how we learn behaviors or modify existing ones-emphasis on rewards and punishers-can include mental or cognitive responses in addition to observable behaviors/how we think about the rewards or punishers that we receive
Humanistic: emphasizes each individual has freedom in directing his future, says we all strive for personal growth and self-fulfillment/because of emphasis on free-will and lack of experimental methods, sometimes seen as more as philosophy and not science of human behavior/positive psychology is the scientific study of optimal human functioning, focusing on strength and virtues of individuals
How is structuralism different from functionalism or gastalt or behaviorism?
Structuralism: elements of the mind/Wundt considered father of psychology and structuralism/asked individuals to look inward and report their sensations as (un)pleasant/believed sensations and perceptions make up the consciousness of the mind/criticized as very narrow and subjective, it’s not useful just to examine sensations//but ideas started the examination of what is the mind
Functionalism: (or structural functionalism) is the perspective in sociology according to which society consists of different but related parts, each of which serves a particular purpose/problems in a single part of society can disrupt the whole
Gastalt: emphasized that the whole pattern of something is more important to our minds than just the sum of its parts/studies examined how we perceive things that happen around us(lights blinking appear to be moving)/Wertheimer and other gastalt psychologists studied how sensations are assembled into meaningful perceptual experiences/advancement over previous theories because it added how our minds interpret events
Behaviorism: refers to a psychological approach which emphasizes scientific and objective methods of investigation/only concerned with observable stimulus-response behaviors, and states all behaviors are learned through interaction with the environment
Career option(s) for psychologists
Academic Counselor
Case Worker
Child Care Worker
Explain types of descriptive research and their advantages/disadvantages
Survey: asking a set of questions by phone, mail or in person/send a survey to all parents in a school district asking about symptoms of ADHD in their child//A-quick and efficient,can compare answers, helps to identify problems and evaluate treatment plans//D-errors, bias
Naturalistic observation: watching the individuals in a natural setting such as a school, park or museum to see how many children display symptoms//A-more “typical” behavior//D-researcher bias, lack of control makes it impossible to assign cause
Case study: in-depth analysis of the thoughts, feelings, beliefs, experiences, behaviors, or problems of a single individual//A-detailed info allows greater understanding of a single person’s life//D-researcher bias,difficult to generalize
Describe correlations in research, what they tell us and what a positive or negative correlation means
Correlation Design: Looks for an association or relationship between the occurrence of two or more events//D-can not explain a cause & effect//A-provide clues to the actual causal relationship, guides research to look farther//Ex: does ADHD occur more often in boys or girls?//Does the diagnosis correlate with gender?
Positive: means as there is more of one variable, there is also more of the second variable//Ex: as children grow in height, their brain size increases too
Negative: means as there is more of one variable, there is less of the second variable//Ex: as children get older, they tend to cry less to get their needs met
What is an independent and a dependent variable in experimental research?
Independent variable: a treatment or something that the researcher controls or manipulates
Dependent variable: one or more of the participants’ behaviors that are used to measure the potential effects of the treatment or independent variable
Explain what is a control group, random selection and double-blind procedure in experiments?
Control group: participants who undergo all the same procedures as the experimental participants but don’t receive the treatment
Random selection: each participant in a sample population has an equal chance of being selected for the experiment/Ex: draw numbers, flip a coin, select every 3rd person who is eligible on a list of names, etc
Double-blind procedure: neither participants or the researchers know which group is receiving the active treatment//eliminates chances the results will be biased by expectations
What is a placebo?
Placebo: a pill, injection, or other treatment that looks like it could work but, in fact, has no true effects
Describe the difference between longitudinal and cross-sectional time spans
Longitudinal: Same group studied at different times//Ex: study of children age 5, then again at age 10
Cross-Sectional: Differing groups studied at the same time//Ex: study a group of children age 5 and another group age 10 (this means the study can be completed sooner instead of waiting for the 5 year-olds to grow)
Identify the reasons for double-blind and control group in research
The control group is necessary for comparison.
The double-blind experiment is to prevent bias in the experimentation results.
Explain what is important for ethics in research
Informed consent Protection from harm Privacy Knowledge of results of the experiment Beneficial treatments offered afterwards
What kinds of cells are in the brain?
Glial cells: Provide scaffold to guide the growth of
developing neurons and support mature neurons//Wrap around neurons and form an insulation to prevent interference from other electrical signals//Release chemicals to neurons throughout the brain
Neurons: nerve cells with two specialized extensions//one extension is for receiving electrical signals, called dendrites//other longer extension is for transmitting electrical signals to other cells, called axons//are in the brain and throughout the body//communicate through chemical messages in the space between the neurons called synapses
Know the terms axon, dendrite, myelin and synapse
NEURONS
Axon: the other, longer extension is for transmitting electrical signals to other cells
Dendrite: one extension is for receiving electrical signals
Myelin: a fatty material that wraps around and insulates an axon//normal breaks in the myelin along the axon help to speed the signals along the length of the axon//prevents interference from other electrical signals
Synapse: “End bulbs” located at extreme ends of the axon’s branches where chemical messages called neurotransmitters are stored
SYNAPSE = Infinitely small space (20-30 billionths of a meter)//When neurotransmitters enter the synapse they carry the chemical messages that excite or inhibit nearby nerve cells
What is the difference between the central nervous system and the peripheral nervous system?
Central nervous system (CNS): Made of nerve cells located in the brain and spinal cord//When these nerve cells are damaged there is a very limited ability for re-growth or repair//Causes problems with motor coordination, strength and sensation//May be permanent disability in the person’s function to walk, talk, feel sensations, etc
Made up of nerve cells located throughout the body, not in the brain or spinal cord
Peripheral: “away from the center”//These axons and dendrites come from the spinal cord and are held together by connective tissue//Carry signals from the senses, skin, muscles, and organs to the spinal cord and back again//Nerve cells in the peripheral nervous system have the ability to re-grow or reattach if severed or damaged//Ex: a severed limb can re-grow nerves that communicate with the brain
If injured, what chance is there for recovery for central vs peripheral nerves?
Central: very limited ability for re-growth or repair//Causes problems with motor coordination, strength and sensation//May be permanent disability in the person’s function to walk, talk, feel sensations, etc
Peripheral: /Nerve cells in the peripheral nervous system have the ability to re-grow or reattach if severed or damaged//Ex: a severed limb can re-grow nerves that communicate with the brain
Describe the process of action potentials and how nerve cells transmit signals
Axons act as chemical gates//open to allow electrically charged particles called ions to enter or close to keep them out//fluid in the axon contains several different ions such as sodium, potassium, chloride and protein//some are positively charged, some are negative//axon membrane keeps the positively charged ions and the negatively charged ions apart//means that there is a “charge” or “potential” for the ions to move across the membrane//RESTING STATE=Axon’s charge or potential makes it like a charged battery, ready to give up energy// Positively charged sodium is outside the axon membrane and negatively charged protein is inside the axon’s membrane//Safeguards are present to keep the charged ions separate//Most important is the sodium pump// transport process that picks up any sodium ions that get inside the axon’s fluid and returns them back outside//keeping the axon charged//EXCITED NERVE CELL=Touch a hot stove and the chemical signals from the skin excite the nerve cell//causes the sodium pump to stop momentarily and the sodium ions rush inside the axon// tiny electric current is generated when positively charged sodium ions go inside the axon fluid to be with the negatively charged protein//Causes the charge outside the axon to now be negative and the charge inside is positive//Immediately afterward, the sodium pump starts up again and returns the axon to the resting state//Once activated, the action potential repeats at each point along the axon where there is a break in the myelin covering, picks up again at the next myelin break//Continues to the end of the axon where it reaches the end bulb and triggers the release of neurotransmitters
What are neurotransmitters and how do they work?
These chemicals enter the synapse and either inhibit or excite the function of neighboring nerve cells in the brain, organs, muscles or other cells//Excitatory transmitters open chemical locks and turn on nerve cells//Inhibitory transmitters block chemical locks and turn off nerve cells
Explain how drugs can interfere with neurotransmitters
Alcohol affects the brain by imitating GABA//Alcohol molecules so closely resemble those of GABA that alcohol can open these receptors//When GABA-neurons are excited, they decrease neural activity//means the brain doesn’t work as well-loss of coordination and judgment, decreased self-control, lower inhibitions, etc
Cocaine blocks reuptake of dopamine from the synapse//Extra dopamine is usually removed from the synaptic space and transported back into the end bulbs//cocaine keeps the extra from being removed so it stays in the synapse longer
How do reflex nerve responses work?
Sometimes immediate action is needed
Ex, touch a hot stove: Sensory nerves in the skin called afferent neurons send a signal to the spinal cord//Afferent neurons have dendrites 2-3 feet long to reach from tips of fingers to the spinal cord//Spinal cord transmits to an interneuron//Interneuron transmits to the brain to register pain//also transmits to the efferent neuron//Axons of efferent neurons are 2-3 feet long to reach muscles and causes you to withdraw your hand quickly, this is a reflex
Describe thresholds for stimuli
Threshold of perception: apoint above which a stimulus is perceived and below which it isn’t//Ex: sounds or voices in the background of an audio tape aren’t loud enough to catch a person’s attention
Absolute Threshold: The intensity level of a stimulus such that a person will have a 50% chance of detecting it
Subliminal Stimulus: a stimulus with levels below a person’s absolute threshold//the person is not consciously aware of the stimulus//Whether subliminal stimuli can attract the brain’s attention on a subconscious level has been a longstanding controversy //Ex: word “popcorn” flashed on a movie screen at the theater, but it doesn’t stay up long enough for moviegoers to read it. Does it register in the brain and influence people to buy popcorn?
What is the difference between sensations and perceptions?
Sensations: Senses pick up a stimuli such as an image//Sensory receptors produce electrical signals that are transformed by the brain into meaningless bits of information
Perceptions: The experience we have after our brain assembles and combines thousands of individual sensations into a meaningful pattern or image
How do sensations change into perceptions?
- Stimulus is a change in the environment (light waves, sounds, etc)
- Transduction, which is the change of physical energy into electrical signals that travel to the brain//Ex: Light hits the retina in the eye and is changed into electrical signals
- Brain receives impulses from senses and reach the primary areas//Ex: Impulses from ear go to the temporal lobe
- Sensation impulses are sent to the association area in the brain//Meaningless bits of sensation are changes into images that we perceive as meaningful
- Personalized perceptions are automatically added by the brain//Ex: Previously frightened by a spider leads to perception that all spiders are bad