Intro To Psychology Flashcards
What is an experiment?
A hypothesis is tested and variables are controlled
What is the purpose of a control group?
Baseline comparison group
What are demand characteristics?
- The aim is guessed
- try to make sense of the situation
- participants act how they think they should
What is operationalisation?
Make independent and dependent variable testable and measurable
What is a directional hypothesis?
States direction of predicted difference between conditions
What is a non-directional hypothesis?
Predicts difference between conditions without stating it
What is a null hypothesis?
Predicts no difference between conditions
What does scientific mean?
Observable behaviour objectively measured
What are extraneous variables?
Variables that effect dependent but not independent variable
What are confounding variables?
Variables that systematically change with the independent variable
Give an example of an extraneous variable?
individual differences
What are investigator effects?
Unwanted influence by investigator on results
What is standardisation?
Participants subject to same environment, information and experience
What does randomisation help to reduce?
- extraneous variables
- confounding variables
- investigator effects
What is an experimental design?
How participants are allocated to conditions
What is the independent groups design?
Different groups take part in each condition of independent variable
What are strengths of using independent groups design?
- more valid
- less likely to guess aim
What is the repeated measures design?
Same groups take part in each condition of independent variable
What are the strengths of using a repeated measures design?
- less participant variables
- more reliable