AQA Psychology 2015 specification research methods booklet 1: research methods and scientific proces

A comprehensive research methods booklet covering the first part of the year 1 specification.
This booklet includes;

• Aims: stating aims, the difference between aims and hypotheses
• Hypotheses: directional and non-directional
• Variables: including independent and dependent, operationalising variables
• Sampling: the difference between population and sample; sampling techniques including random, systematic, stratified, opportunity and volunteer; implications of sampling techniques including bias and generalisation
• Pilot studies and the aims of piloting
• Experimental designs: repeated measures, independent groups matched pairs
• Observational design: behavioural categories, event sampling, time sampling
• Demand characteristics and investigator effects
• Variables extraneous and confounding
• Control: randomisation and standardisation
• Control: random allocation and counterbalancing

There is a second booklet for experimental design including different types of research methods.