PSYC1003 Lecture Notes - Lecture 5: Pseudoscience, Convenience Sampling, Weight Loss
Psychology 1003 September 21st 2016
Evaluating Research
Sampling Bias:
- Self selection bias
Criticisms of convenience sampling (WEIRD)
Western, Educated, Industrialized, Rich and Democratic
Subject Bias:
Placebo effect: e.g. Weight loss pills
Hawthorn effect: behaviour is influenced simply by knowing youre being observed
Social desirability bias: act in a way that makes them look socially desirable
Halo effect:(Good subject effect) trying to respond or act in a way the researcher would want
Response set: someone chooses an extreme answer that doesn’t really give you information.
E.g. Teacher evaluation survey
Experimenter Bias:
Experimenter expectations can influence subject behaviour
Double Blind Procedure:
Neither subjects nor experimenters know which subjects are in the experimental and which
hare in the control groups.
Meta-Analysis
A study of many other studies
Combines the statistical results of many studies asking the same questions
Offers an estimate of the size and consistency of a variables effects.
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Document Summary
Hawthorn effect: behaviour is influenced simply by knowing youre being observed. Social desirability bias: act in a way that makes them look socially desirable. Halo effect:(good subject effect) trying to respond or act in a way the researcher would want. Response set: someone chooses an extreme answer that doesn"t really give you information. Neither subjects nor experimenters know which subjects are in the experimental and which hare in the control groups. Combines the statistical results of many studies asking the same questions. Offers an estimate of the size and consistency of a variables effects. Ethical standards for research: the american psychological association (apa) and cpa. Ensures both human and animal subjects are treated with dignity. Consent: sufficient information to decide whether to participate. Deception: desire to have subjects act naturally. Most deception research involves partial deception! (or omission of information)
