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Research methods flash cards

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  • July 28, 2024
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Psychology
Research methods
Correlation

Describe correlation
• A method used to assess the degree to which 2 co-variables are related


Strengths of correlation
• + Provides a means of looking at relationships between continuous variables and
determining whether relationship is significant.
• + Useful way to conduct a preliminary analysis on data


Weaknesses of correlation
• - Can't show cause-and-effect relationship as there is no IV that's been altered
• - There may be intervening variables explaining why the co-variables being studied
are linked.


Hypotheses

Describe directional (one-tailed) hypothesis
• States the direction of the hypothesis, like one condition is more useful than others
• Ppl who sleep for 8 hours have higher score on a memory test than those who sleep
for 5 hours
• IV increases/decreases DV


Describe non-directional (two-tailed) hypothesis
• States there is a difference. Can go in any direction
• Ppl who sleep for 8h perform differently on a memory test than those who sleep for
5h
• IV affects DV


Inferential stats



Inferential test decision tree

, 1. Difference or relationship
2. Nominal or ordinal data
3. Independent groups or repeated measures




Difference/ relationship and nominal data
Chi-squared test




Relationship and ordinal data




Spearman's rho test




Difference, ordinal data and independent groups




Mann-Whitney U test




Difference, ordinal data and repeated measures

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