Research Methods Flashcards
ANALYSING RESULTS
Describe the three ways to measure central tendency
Mean, median and mode
ANALYSING RESULTS
Describe the two measures of dispersion
Range and standard deviation
ANALYSING RESULTS
What does more spread out results show?
A greater variation
ANALYSING RESULTS
Define standard deviation
How far results deviate from the mean
ANALYSING RESULTS
With standard deviation, what does a bigger number show?
More deviation
VARIABLES
Define the IV
Change
VARIABLES
Define the dependent variable
What you measure
VARIABLES
Define the control variable
What stays the same
SAMPLING
Random
Every member of the population having an equal chance to be chosen
SAMPLING
Opportunity
Using people who are available and convenient at the time
SAMPLING
Volunteer
Pps who respond to an advertisement
SAMPLING
Systematic
Selecting every nth member of a target population
SAMPLING
Stratified
Splitting the population into sub groups, samples which then consist of direct percentage representation
SAMPLING
Random strength and weakness
- Free from bias
- May not be representative
SAMPLING
Opportunity strength and weakness
- Convenient, quick, easy
- Unrepresentative
SAMPLING
Volunteer strength and weakness
- Simple and easy
- Volunteer bias
SAMPLING
Stratified strength and weakness
- Representative of the pop
- Time consuming
SAMPLING
Systematic strength and weakness
- Free from bias
- Time consuming
EXPERIMENTAL DESIGNS
Define an independent measures design
Pps only take part in one condition of the experiment
EXPERIMENTAL DESIGNS
Define a repeated measures design
Pps all take part in both conditions of the experiment
EXPERIMENTAL DESIGNS
Define a matched pairs design
Pps matched on characteristics relevant to experiment performance, they then do each different condition
EXPERIMENTAL DESIGNS
Positive of Independent measures design
Avoids order effects bc only doing one condition
EXPERIMENTAL DESIGNS
Negative of independent measures design
Individual differences may affect results: could use a random generator
EXPERIMENTAL DESIGNS
Positives of repeated measures design
- Individual differences are reduced
EXPERIMENTAL DESIGNS
Negatives of repeated measures design
Order effects: fatigue or practice, ABBA
EXPERIMENTAL DESIGNS
Positives of matched pairs design
Avoids order effects
EXPERIMENTAL DESIGNS
Negative of matched pairs design
Time consuming
EXPERIMENTAL METHODS
Describe a lab experiment
- To establish a cause and effect between IV and DV
- Takes place in controlled environment
EXPERIMENTAL METHODS
Give two positives of lab experiments
- Limiting extraneous variables
- Accurate measure of DV
EXPERIMENTAL METHODS
Give two negatives of lab experiments
- Low ecological validity
- Low mundane realism
EXPERIMENTAL METHODS
Describe a field experiment
- Take place outside of a lab, natural environment, basic scientific procedures are followed
- IV manipulated, DV measured, non-controlled environment
EXPERIMENTAL METHODS
Give two positives of a field experiment
- Ecological validity
- Mundane realism: viable
EXPERIMENTAL METHODS
Give two negatives of a field experiment
- Ethics: consent
- Extraneous variables
EXPERIMENTAL METHODS
Describe a natural experiment
- Researches make use of naturally occurring variables
- No manipulation of an IV, but DV is measured
- Impossible or unethical, so cannot be arranged
EXPERIMENTAL METHODS
Give two positives of a natural experiment
- High ecological validity
- Provide research opportunities
EXPERIMENTAL METHODS
Give two negatives of a natural experiment
- Can lack generalisability
- Lack of opportunity for full study
EXPERIMENTAL METHODS
Describe a Quasi experiment
- All features of a lab experiment but IV is a pp characteristic, such as gender
- Thus, IV is not fully under researchers control
EXPERIMENTAL METHODS
Give one positive of a quasi experiment
Controlled conditions
EXPERIMENTAL METHODS
Give one negative of a Quasi experiment
Cannot randomly allocate pps to a condition
CORRELATIONS
What are correlations plotted on?
Scatter graphs
CORRELATIONS
What do correlations look at?
The strength of the relationship between two variables
CORRELATIONS
What do correlations look at?
The strength of the relationship between two variables
CORRELATIONS
What are the variables often referred to as?
Co-variables
CORRELATIONS
Describe a positive correlation
Both variables increase
CORRELATIONS
Describe a negative correlation
As one increases the other decreases
CORRELATIONS
Define no correlation
There is no relationship between two variables
CORRELATIONS
How is the strength of a correlation written as?
A co-efficient from -1 to +1, the - and + indicate the direction of correlation, making both equally as strong
CORRELATIONS
Negative
Cannot establish cause and effect
CORRELATIONS
Positive
They are useful for studying potentially unethical topics
QUESTIONNAIRES
What do pps do?
Record their own answers
QUESTIONAIRRES
What are the three types of questions which can be used?
Closed questions, open questions, likert scale
QUESTIONAIRRES
Give three positives of questionnaires
- Give out to large numbers
- Less time consuming
- Accessible
QUESTIONAIRRES
Give two negatives of questionnaires
- Self report technique
- Low response rate
INTERVIEWS
What is an interview?
Face to face questioning to build a narrative
INTERVIEWS
What are the three types of interview
Structured, semi structured and unstructured
INTERVIEWS
Give two positives of interviews
- Clarification and expansion
- Body language
INTERVIEWS
Give two negatives of interviews
- Time consuming
- Interviewer presence may affect pp response
CASE STUDIES
What is a case study?
A detailed study of an individual or small group.
CASE STUDIES
What do researchers do?
Post their data and look for common themes and threads