research methods Flashcards
What is an experimental method?
Experimental methods involved the manipulation of variables to establish cause and effect relationships and where a hypothesis is scientifically tested.
What is the difference between a directional and a non-directional hypothesis?
Directional hypothesis: Predicts the direction of the effect of the independent variable on the dependent variable , for example “ Children who listen to loud music will perform worse on a test than children who listen to relaxing music”
Non-directional hypothesis: The independent variable will have an effect on the dependent variable however the direction is not specified. For example, “ There will be a difference between the performance level of the children depending on what music they listen to”
What is a lab experiment and what are some pros and cons of it?
A lab experiment is conducted under highly controlled conditions and study behaviour in a very standardised procedure.
The researcher will have all control of variables and participants will be randomly allocated to conditions to avoid bias.
+ Replicable , making the experiment/hypothesis if found true to be more reliable
+ Allow precise control of extraneous variables which may effect the results, more validity
+ Allow the establishment of a cause and effect relationship
X Artificial settings are not reflective of real life behaviours, therefore has a low ecological validity (lacks mundane realism)
X Demand characteristic may affect how the participants behave, may not be an accurate measurement of how they would actually behave
What is a field experiment, state the pros and cons.
A field experiment is an experiment conducted in every day life of participants. The experimenter is still responsible for manipulating the IV but do not have full control over extraneous variables.
+ The natural environment are more likely to reflect real life behaviours as they are unaware they are being studied
+ Less likelihood of demand characteristics for the same reason
X Less control over extraneous variables which may bias and effect the results
X Harder to replicate
What is a natural experiment, list the pros and cons.
A natural experiment is conducted in everyday live, but the experimenter has no control over the independent variable as it occurs naturally.
+ Very high ecological validity due to its natural settings
+ Less likely hood of demand characteristics as participants are unaware they are being studied
+ Can be used to research unethical situations as the IV they wish to study has already occurred
X No control over extraneous variables so it if difficult to replicate
What is a Quasai experiment?
Research where the investigator can’t randomly assign participants to conditions, control the IV and limit the influence the extraneous variables.
They use pre-existing groups
What is a participant observation and what are the pros and cons?
Participant observation is a variant of a natural observation where the researcher will join in directly with the group being studied.
This can occur in cover (undercover) or overt (researcher asks permission to observe)
+ Allows insight deep in cultures and has high ecological validity as the researcher is looking from the groups perspective
X If the researcher becomes too involved with the group it could lead to potential bias that will affect the results
X Difficult to get time and privacy for recording as covert studies require note taking and videoing under cover
What is a controlled observation?
A structured observation conducted in laboratory settings where the researcher will decide where it takes place, what time and what participants as it is a highly standardised procedure.
They will operationalise distinct behaviours into categories and record behaviour based on these, e.g Mary Ainsworth.
+ Easy to replicate + test for reliability
+ Quantitate data = More objective and easier to analysis
X Lacks validity due to mundane realism and demand characteristics as participants are aware they are being observed
X Lacks generalisability as a result
What is a natural observation?
A natural observation is studying/observing behaviours in a natural environment where all relevant behaviour is recorded and usually a pilot study is conducted beforehand so what behaviours need to be recorded can be set beforehand.
+Greater ecological validity than a controlled observation
+Generates new ideas like case studies
=Less reliable due to not being able to control extraneous variables and therefore hard to repeat
=Cannot establish cause and effect as a result
What is a participant observation?
An observation conduced where the researcher joins in the group . This can be covert (undercover) or overt (researcher asks premission to observe)
+High ecological validity as the observer gains direct insight in the shoes of the people being observed
=Difficult to have time to record and observe behaviours, recording may blow their cover
=If researcher becomes too involved, they may develop biased ideas
How is data classified in observations?
Event sampling: What type of behaviour/events are in interest and what is not needed to be recorded
Time sampling: What time periods should samples be taken and how often should this occur?
What does correlation mean?
The extent to which two variables are related/ effect each other.
What is correlational analysis and how can you represent correlational data?
Correlational analysis is testing a hypothesis by using an association between two variables and this can be represented by a scatter graph or a correlation coefficent.
What are the strengths and weaknesses of correlational analysis?
+ Allows the analysis of situations that cannot be experimentally measured
+ Develops analyse and predict casual relationships between two variables
= Correlation does not always mean causation
= Confounding variables may influence correlation
What is a questionnaire?
A questionnaire is a research instrument consisting of a series of questions for the purpose of gathering information which can use both open and closed questions.
+Researcher does not need to be present to gather the data so it is useful in gathering insight on large populations
=Can be inaccurate due to social desirability bias
What are the differences between open and closed questions?
Open: Allow people to express how they feel in their own words and in detail providing rich qualitative data.
+Allows more flexible information than closed questions and can be used for more complex situations
=Harder to analyse experimentally
Closed: Answers consist of pre-decided categories, nominal or ordinal data
+Provides a large amount of data that can be easily converted to quantitive data
=Lacks detail and hard to understand for more complex situations
What are interviews?
Interviews are a directed conversation between a researcher and client/participant which aims to gain information for the purposes of research, diagnosis or treatment.
What are the differences between structured and unstructured interviews?
Structured interviews use closed-end questions with an interview schedule with a standardised format which will not be deviated from.
+Easy to replicate and therefore can be test for replicability
+ Easy to conduct on a large sample as the same standardised format is used hence more information
=Not flexible to all situations as the format cannot be changed
=Lacks detail so the researcher way not know why a person acts a specific way as they cannot ask further
Unstructured interviews do not follow a specific schedule and asks open ended questions based on a specific research topics which attempts to flow like a natural conversation and gain detailed quantitative data.
+More fliexible as questions can be adapted and changed, therefore more in depth data therefore increased validity
=Time consuming as each interview has to be conducted for a longer time and you have to be more specialised
What is a focus group interview?
A focus group interview is when respondents are interviewed together to gain an understanding of social issues and these people are purposely chosen for this event.
+Generate detailed qualitative data with different contributing ideas and increased validity
=Social desirability and conformity may affect the results therefore inaccurate
What is an independent measures design?
Different participants are allocated to each condition of the independent variable meaning each condition will contain a different group.
These groups are chosen randomly, equal chance of being chosen.
+Avoids order effects on participants as participants only appear in one condition each
=Individual differences may affect results such as the variation of age, ethnicity
What is a repeated measures design?
The same participants will appear in each condition of the IV meaning each condition will have the same group of participants.
+No individual differences can effect results
=Order effects, they may preform better as they know what is coming
Order effects can be decreased by alternating the order which participants preform in different conditions, counter balancing
What is a matched pairs design?
Pairs of participants are matched in terms of key variables where one member of each pair is placed in an experimental group and another one is placed in a control group
+Reduces individual differences greatly as they are matched for a trait and avoids order effects
=One person dropping out can loose both the data
What is the difference between quantitative data and qualitative data?
Quantitative data is information regarding numbers whereas qualitative data is descriptive information that cannot be measured with numbers.
What did the BPS state about psychological research?
The BPS stated that psychological research should benefit the economy in a substantial way which can be applied to every day life and benefit society.
