PSYB01H3 Chapter Notes - Chapter 9: Magnetic Resonance Imaging, Electrodermal Activity, Behavioral Neuroscience
Document Summary
3 types of dependent variables: self report, behavioral, physiological. Sensitivity of dependent variable, floor vs. ceiling effects. Ways to control participant and experimenter expectations. Population: all individuals of interest to researcher. The method used to select participants affect external validity (extent to generalize result to other populations and settings). If it is important to accurately describe the population, use probability sampling. If want to test hypotheses, x causes y, relationships, test predictions from theories: use non- probability sampling like haphazard of convenience methods. Recognize that they affect the ability to generalize your results to some larger population. Sample size: larger = more likely the results can be statistically significant, cause larger sample provide accurate estimates of population values. Usually select typical size for studies in the area, but more formal way is the power analysis. Construct operational definition, turn conceptual variable into set of operations specific instructions, events, stimuli. Manipulation is when changes the conditions the participants are exposed to.
