Introduction to research methods in psychology by Dennis Howitt; Duncan Cramer

By Dennis Howitt; Duncan Cramer

The authors supply entire and cutting edge insurance of quantitative and qualitative study tools for psychology scholars all through their experiences. The study technique is damaged down into possible steps to equip scholars with the abilities to invite clever learn questions and write up their findings.

content material: the fundamentals of analysis --
Quantitative examine equipment --
basics of checking out and dimension --
Qualitative learn tools --
examine for initiatives, dissertations, and theses.
summary: The authors offer finished and cutting edge insurance of quantitative and qualitative study tools for psychology scholars all through their experiences. The learn method is damaged down into viable steps to equip scholars with the talents to invite clever study questions and write up their findings

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Extra resources for Introduction to research methods in psychology

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However, one can compare the effect size of these two kinds of studies to see whether the effect size differs. If the effect size does not differ (as has been found in some studies), then the effect size is unlikely to be biased by the more poorly designed studies. Sometimes, meta-analytic studies have used ratings by researchers of the overall quality of each of the studies in the meta-analysis. In this way, it is possible to investigate the relationship between quality of the study and the size of the effects found.

In the other condition, participants are selected at random but paired with another person dissimilar in attitude to them, again selected at random. By allocating participants to similarity and dissimilarity conditions by chance, any differences between the conditions cannot be accounted for by these confounding variables. 4). 4 .. qxd 8/11/2007 13:19 Page 14 14 | Part 1 ■ The basics of research The simplest way of randomisation in this example is to allocate participants to the different conditions by tossing a coin.

Thus these beliefs would be responsible for the difference in attraction. In other words when we manipulate a variable in a study we may, in fact, inadvertently manipulate other variables without realising it. We could try to hold these other factors constant by making sure that the stranger was similar to the participant in these respects, or we could test for the effects of these other factors by manipulating them as well as similarity of attitude. This kind of study where: ■ ■ ■ the presumed cause of an effect is manipulated, participants are randomly assigned to conditions, and all other factors are held constant has been called a true experiment by Campbell and Stanley (1963).

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