Social psychologist Dr. Playnice is trying to develop a simple measure of prosocial behaviours. She has administered a four-item survey to a very large sample. The survey items are: How many hours do you volunteer per week? How much money do you donate to charitable organizations per year? How much do you recycle waste at home? How often do you make unsolicited criticisms of individuals or groups directly or through public social media venues? Survey respondents answered each question via 5-item multiple choice. Dr. Playnice will be adding these together to form a single “Prosocial” score. Dr. Playnice would eventually like to investigate the effects of the “social media generation” in either promoting or inhibiting prosocial behaviours. To this end, she has selected a sub-sample of 25 young adults (age 20-25) and 25 middle-aged adults (age 50-55) and will be comparing their scores in a quasi- experiment. What are some general limitations that Dr. Playnice will have to consider when interpreting the results of her study? What are some potential threats to internal validity that could provide an alternate explanation for the results? internal validity threats (Design Confound, Selection effect, Order effect, Maturation, History, Regression to the mean, Attrition, Testing, Instrumentation, Observer bias, Demand characteristic, Placebo effect)

Ciccarelli: Psychology_5 (5th Edition)

5th Edition

ISBN:9780134477961

Author:Saundra K. Ciccarelli, J. Noland White

Publisher:Saundra K. Ciccarelli, J. Noland White

Chapter1: The Science Of Psychology

Section: Chapter Questions

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Social psychologist Dr. Playnice is trying to develop a simple measure of prosocial behaviours. She has administered a four-item survey to a very large sample. The survey items are:

How many hours do you volunteer per week?
How much money do you donate to charitable organizations per year?
How much do you recycle waste at home?
How often do you make unsolicited criticisms of individuals or groups directly or through public

social media venues?

Survey respondents answered each question via 5-item multiple choice. Dr. Playnice will be adding these together to form a single “Prosocial” score.

Dr. Playnice would eventually like to investigate the effects of the “social media generation” in either promoting or inhibiting prosocial behaviours. To this end, she has selected a sub-sample of 25 young adults (age 20-25) and 25 middle-aged adults (age 50-55) and will be comparing their scores in a quasi- experiment.

What are some general limitations that Dr. Playnice will have to consider when interpreting the results of her study? What are some potential threats to internal validity that could provide an alternate explanation for the results?

internal validity threats (Design Confound, Selection effect, Order effect, Maturation, History, Regression to the mean, Attrition, Testing, Instrumentation, Observer bias, Demand characteristic, Placebo effect)

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