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We’ve been adding some new films to the redesigned web site, starting with a batch of four films covering experimental research design and methods.

Natural Experiments
Natural Experiments

The films have been designed as relatively short introductions to a specific method or concept and each provides an overview of its chosen topic, how it has been applied in a particular study or studies and an evaluation of its strengths / weaknesses / limitations.

Experimental Design
(7 minutes)
The film starts with a simple research question – What is the most effective time of day for students to learn new material? – as a way of providing practical illustrations of the strengths and possible limitations of repeated measures, independent measures and matched pairs experimental designs.
This is subsequently developed by using three classic experimental studies (the Stroop Effect, Loftus’ eyewitness testimony experiments and Bandura’s bobo doll experiments to show why a particular experimental design was used in each case.

Lab experiments
Laboratory Experiments

Laboratory Experiments
(7 minutes)
This short film uses a number of well-known psychological studies (Watson, Asch, Bandura, Harlow, Loftus…) to explain the experimental method and illustrate how laboratory experiments are done. This includes evaluating their strengths and limitations and how these limitations do not apply uniformly to all experimental studies.

Field Experiments
(5 minutes)
Three classic studies – Hofling’s study of nurse obedience, Fischer’s test of the cognitive interview and the Pilliavins’ research on good Samaritans – are used to illustrate what field experiments offer psychologists compared to other experimental methods. The film also looks at the difficulties involved with setting up field experiments and examines their strengths and limitations.

Natural Experiments
(6 minutes)
In natural experiments, circumstances present researchers with an opportunity to test the effect of one variable on another in ways that could not be done in a laboratory experiment. This film looks at natural experiments in psychology to illustrate how they work, their differences from other methods, and their strengths and limitations.

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