psyc_aug27

psyc_aug27 - Do people recognize positive or negative words...

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Monday August 27, 2007 Continued on Research in Psychology λ The Research Process λ An investigation consists of a sequence of planned steps. λ We reviewed figure 2.1 (Weiten) λ Basic investigative steps include: Form a hypothesis, design the study, collect the data, analyze the data and draw conclusions, and report the findings. λ Experiments find cause and effect relationships. λ Researchers manipulate a variable to see its effects on another. λ Review from August 24 lecture on variables. λ Extraneous variables are any variables (other than the independent) that may influence the dependent variable. λ Random assignment: each subject has an equal chance of being assigned to any condition of the independent variable. λ Random sampling: sample drawn randomly from the population. λ Other Experimental Designs λ Expose one group of two different conditions λ (For example:
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Unformatted text preview: Do people recognize positive or negative words more quickly?) Use more than one dependent variable Manipulate two independent variables Strength in Experimental Research Conclusions about cause-effect can be made. Weaknesses Nature of experiments are relatively artificial. There are ethical issues/limits concerning experiments. Correlational Studies Correlational studies identify associations between variables. These kinds of studies are useful when one cannot manipulate the independent variable. Two alternative explanations in correlational findings: Third-variable complication (extraneous variable) Directionality (reverse causality problem) Perhaps some people just have tendencies that are unrelated to the study. **Correlation does not equal causation!...
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psyc_aug27 - Do people recognize positive or negative words...

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