4.2.3 - Research Methods - Scientific processes Flashcards
Research methods
The way Psychologists carry out research into areas of Human behaviour.
Androcentric
Male focussed
Gynocentric
Female focussed
Objective
Keeping a critical distance and not influenced by opinion
Validity
The extent to which a test measures what it claims to measure
Reliability
The consistency of research
Experiment
Involves the manipulation of an independent variable to measure the effect on the dependent variable
What are the 2 types of hypothesis?
- Directional Hypothesis (one-tailed- states direction of effect)
2.Non-Directional Hypothesis (two-tailed - does not state direction of the effect)
What are the two types of experimental conditions?
- The control condition
- The experimental condition
What is the control condition?
The condition where there is no manipulation of the IV.
What is the experimental condition?
Where the IV is manipulated.
What does operationalised mean?
That the IV and DV are measurable
Extraneous variables
Nuisance variables that may affect results e.g. temperature of room, distractions (need to be controlled)
Confounding variables
Unwanted variables which might have affected the DV, so we cannot be sure of the true source of the changes to the DV
Experimental design
The way in which participants are used in experiments (how they are arranged)
Independent groups
2 separate groups of participants experience 2 different conditions of the experiment
Repeated measures
All participants experince both conditions of the experiment
Matched pairs
Participants paired based on a common variable e.g. IQ, age - Attempts to control for confounding variable of participant variables
Internal validity
Refers to whether we can confidentely say the IV being manipulated is influencing the DV
External validity
Refers to whether we can apply our results outside of the study e.g. to wider population
Determinism
The idea that all behaviour is controlled, influenced by external (or internal) forces. It suggests that humans do not have free will
Random allocation
Participants randomly allocated to different experimental conditions to easily distribute participant characteristics
Counterbalancing
An attempt to control order effects in a repeated measures design - half participants take part in condition A then B, other half take part in condition B then A
What are the 4 types of experiment?
- laboratory experiments
- field experiment
- natural experiments
- quasi-experiments
What is a laboratory experiment? (and eval)
Conducted in highly controlled environments
:) - high level of control - high internal validity
- researcher can establish cause and effect
:( - low external validity - difficult to generalise to real life
- low mundane realism as tasks and environment is artificial
- demand characteristics
What is a field experiment? (and eval)
IV is manipulated in a natural, everyday setting.
The researcher goes to the participants’ usual environment instead of a lab
:) - higher mundane realism - natural environment
- ecological validity
:( - loss of control of CV’s and EV’s
-cause and effect difficult to establish
- ethical issues
What is a natural experiment? (and eval)
-Takes advantage of a pre-existing independent variable
-The variable would have changed if the experimenter was not interested
-Researcher has no control over the IV and cannot change it - something else causes the IV to vary
-IV - naturally occurring
:) - high external validity
- more opportunities for research
:( - natural occurring events may only happen rarely
- ppts may not be randomly allocated to experimental conditions
What is a quasi experiment? (and eval)
-Has an IV that is based on an existing difference between people (e.g. age, gender)
-No one has manipulated the IV , it simply exists, and unlike a natural experiment, the IV cannot be changed
-DV may be naturally occurring or devised by the experimenter
:) → often carried out under controlled conditions - control of variables, easy to replicate, high external validity
:( → cannot randomly allocate ppts - may be confounding variables
→ IV not deliberately changed by the researcher so we cannot claim that the IV has caused any observed change
What is a true experiment?
-IV is under direct control of the researcher who manipulates it and records the effect on the DV
-Lab and field experiments are considered True experiments
Sampling definiton?
How we choose our participants
Ideally should be representative of the target population
What is random sampling?
All members of target population have an equal chance of being selected
e.g. names out of a hat, computer generator
What is systematic sampling?
Every “nth” member of target population is chosen
e.g. every 3rd person on a list or every 5th house on a street
What is stratified sampling?
Sample reflects proportions of people in certain subgroups
-Different strata that make up a population are identified and then the proportions of the strata are worked out
-Ppts that make up each stratum are selected using random sampling
What is opportunity sampling?
Researcher simply decides to select anyone who is willing and available
What is volunteer sampling?
Participants select themselves to be part of the sample - they volunteer
e.g. researcher places advert in newspaper or online
What are the 5 ethical rules?
⮞ Deception - misleading, lying or withholding information from participants
⮞ Right to withdraw - are participants allowed to leave the study when they wish?
⮞ Informed consent - participants are informed what the aim of the study is and what will happen and they then give permission to be a participant and for data to be used
⮞ Protection from harm - ppts should not be placed at any risk - harm can be physical or psychological
⮞ Privacy & confidentiality - participants have the right to control information about themselves
Revision tip for remembering ethical rules?
DRIPP
What is a debrief?
Participants are made aware of aims and any details hidden from them during the investigation after it has finished
What is a pilot study?
A small-scale run of the actual investigation
Why are pilot studies carried out?
- to ‘road test’ the procedure
- check there are are no issues with the study
- gives researcher an opportunity to modify the design or procedure
- saves time and money in the long run
What is a single-blind procedure?
⮞ participants not told aim of the research
⮞ controls for demand characteristics
What is a double-blind procedure?
⮞ neither the participants or the researcher is aware of aims of study
⮞ controls for researcher bias
What are the 6 types of observation?
Naturalistic
Controlled
Covert
Overt
Participant
Non-participant
What is a naturalistic observation (and eval)
⮞ take place in the setting or context where the behaviour would usually occur
⮞ all aspects of the environment are free to vary
:) - high external validity
- can be generalised
:( - replication of study may be difficult
- may be uncontrolled extraneous variables
What is a controlled observation? (and eval)
⮞ some control over variables, including manipulating variables to observe effects and also control of extraneous variables
:) - extraneous variables are less of a factor
- replication is easier
:( - may produce findings that cannot be as readily applied to real-life settings
What is a covert observation? (and eval)
⮞ participants are unaware they are being observed
⮞ observed in secret
:) - as ppts are unaware they are being observed the problem of participant reactivity is removed
- ensures behaviour will be natural - increases validity of the data gathered
:( - ethics of the study may be questionable - may not want their behaviours recorded
What is an overt observation? (and eval)
⮞ participants are aware they are being observed
⮞ have given informed consent beforehand
:) - more ethically acceptable
:( - behaviour of ppts may change as they know they are being observed
What is a participant observation? (and eval)
⮞ observer becomes part of the group they are studying
:) - gives researcher increased insight
- increased validity of findings
:( - researcher may come to identify too strongly with those they are studying and lose objectivity
- may be impractical to join certain groups
What is a non-participant observation? (and eval)
⮞ researcher remains separate from the group they are studying and records their behaviour in a more objective manner
:) - allows researcher to remain objective psychological distance
:( - may lose valuable insight as they are too far removed from the people and behaviour they are studying
What are structured observations?
- observations are quantified
- uses a pre-determined list of behaviours and sampling methods
- a behavioural checklist is created
- there is a structure to the observation
What are unstructured observations?
- write down everything you see - no structure
- produces accounts of behaviour that are rich in detail
What are behavioural categories?
- when a target behaviour is broken up into components that are observable and measureable
- target behaviour should be precisely defined and made observable and measureable
- e.g. affection could be broken down into smiling, hugging, kissing
- no ambiguity or overlap - e.g. grinning and smiling
What is event sampling? (And eval)
- counting the number of times a behaviour occurs in a target individual group
E.g. counting the number of times players disagree with a referee in a football match
:) - useful when a behaviour happens quite infrequently so could be missed with time sampling
:( - if event is too complex then observer may overlook important details
What is time sampling? (And eval)
- recording behaviour within a pre-established time frame
E.g. making a note of what one individual is doing every 30 seconds
:) - reduces amount of observations that have to be made
:( - may be unrepresentative of the observation as a whole
What is inter-observer reliability?
- at least two researchers
- must be consistent in their judgement
- use and agree on behavioural categories
- correlate their observations
- will ensure inter-observer reliability
What are the 2 types of self report methods?
- questionaires
- interviews
What are the 2 types of questions?
Open questions
- no fixed answers, respondents can answer in any way they want
- produces qualitative data which is rich in detail but may be difficult to analyse
Closed questions
- fixed number of responses
- could be yes/no questions of a scale
- usually easy to analyse but may lack depth and detail
Types of closed questions?
- Likert scale - scale of usually 5 points
- Rating scale - respondants identify a value that represents their strength of feeling about a particular topic
- Fixed choice option - includes list of options, respondants are required to indicate those that apply to them
Strengths of questionaires?
- if close-ended questions are used, it is easy to analyse
- can gather large numbers of results - larger sample
- cost-effective
Limitations of questionaires?
- responses may not be truthful
- demand characteristics
- social desirability bias
- response bias - replying a similar way for everything
- data may lack validity
- boredom - answering too quickly
What are things to remember when creating a questionnaire/questions?
Overuse of jargon - don’t overuse technical terms, keep questions simple and easy to understand
Emotive language and Leading quesitons - don’t let your attitiude become clear in the questions, leading questions guide respondents to particular answers
Double barrelled questions and Double Negatives - double-barrelled questions contain 2 questions in one so respondants may agree with only half of thr question , double negatives can be hard to decipher