Research Methods Booklet 2 Flashcards
What is a positive correlation
As one co variable increases so does the other
What is a negative correlation
As one co variable increases the other decreases
What is zero correlation
No relationship between the co variables
What is the correlation coefficient
A numerical measure of strength and direction of the relationship between the co variables always a number between -1 and 1 the stronger the relationship is if there is 0- no relationship.
What will the graph look like if there is a strong correlation
The points on the graph will be plotted closer together
What strength would +1 be
Strong positive correlation
What would 0 to -0.5 be
Weak negative correlation
What to include when writing a correlational hypothesis
Must include both variables that the correlation is testing and be fully operationalised
Never use difference, effect or link
What to include in a directional correlational hypothesis
State if the correlation is positive or negative
What to include in a non directional correlational hypothesis
Must state there is a relationship/correlation but no direction is stated
What to include in a null correlational hypothesis
State there will be no relationship/correlation
Strengths of correlations
- used as initial research to see if Theres a relationship before a full experiment talked place, useful starting point for research and more ethical than an experiment (no manipulation)
- quick and economical to carry out- use secondary data
Limitations of correlations
Cannot establish cause and effect they can only tell us how variables and related not why.
-another untested variable could cause the relationship that we are interested in- third variable problem.
3 differences between experiments and correlations
Experiments have an IV/DV- researcher manipulates IV to see affects on DV. Correlations dont- co variables no manipulation on IV.
Experiments establish cause and affect- how IV affects DV. Correlations don’t as no manipulation.
Experiments can and sometimes can’t control extraneous variables. Correlations do not(third variable problem)
Characteristics of case studies
In depth analysis of an individual group or event.
Involve analysis of unusual individuals or events.
Collect qualitative data: interviews, observations, questionnaires
Longitudinal in nature- long period of time
Strengths of case studies
Offer rich detailed insights into behaviour- qualitative data
Enhances our knowledge of unusual behaviours in the persons natural environments- increases ecological vadiloity
Limitations of case studies
Only one person is part therefore it can be difficult to generalise findings to the wider population.
Personal accounts can be prone to unnacuracy and memory delay
What is content analysis
Research technique that enables indirect study of behaviour by examining communications that people produce e.g texts emails and other media.
Aim of content analysis
Summarise and describe these communications using quantitative data so that overall conclusions can be made
How to conducts a content analysis
Coding-
1 decide on pre determined categories(codes) to look out for in the media.
2. Tally each time a behaviour appears for each category
3. Draw conclusions from the categories which could involve comparing different groups
How to gather thematic analysis
- Analyse media/communication
- Note emergent themes as they arise
3.draw conclusions
Not about pre detrimined categories
Strengths of content analysis
‘Get around’ many of the ethical issues associated with psychological research
Many materials already exists within the public domain therefore there are fewer issues with obtaining permission.
Limitations of content analysis
People are studied indirectly so communication they produce is usually analysed out of the context within which it occurred.
Lack of objectivity, with the researcher attributing opinions and motivations to the speaker/writer which were not intended originally
Quantitative data evaluation
This is data that is numerical or can be turned into number form
Strengths- easy to analyse Put into graphs and identify patterns and trends and more objective- less bias
Limitations- limited detail in responses decreasing insight into results- lowers internal vadiloty
Qualitative data evaluation
Data that is descriptive in depth and detailed
Strengths- lots of detail which increases insight and increases internal vadility
Limitations- harder to analyse and put into graphs to identify patters and less objective and more open to bias
What is primary data
Info that has been obtained first hand by a researcher for the purpose of the research
What is secondary data
Information that has already been collected by someone else;she and so pre dates current research project
Strengths and limitations of primary data
Fits purpose- S
L- time consuming
Strengths and limitations of secondary data
S- less time consuming- not collecting themselves
L- outdated- not match researchers needs
What are pilot studies
Small scale version of an investigation before real one is conducted- make sure all works
Can make changed or modifications
Saves money and time
Why would pilot studies be used for experiments
Check materials that are used are relevant and that IV and DV are fully operationalised to the study to replicate on a larger scale
Why would pilot studies be used for an observation
Check suitability of the behavioural categories e.g check all observers interpret them in the same way and understand them