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5 Written questions
5 Matching questions
 Standard deviation
 Validity
 Naturalistic observation
 Cognitive bias
 Illusionary correlation
 a The measure of dispersion that takes into account how far each data point is from the mean.
 b Watching behavior in realworld settings.
 c A systematic error in thinking.
 d A perception of a statistical association between two variables where none exists.
 e The extent to which a measure assesses what it claims to measure.
5 Multiple choice questions
 The variable that an experimenter measures to see whether the manipulation has an effect.
 The extent to which we can draw causeand effect inferences from a study.
 Any difference between the experimental and control groups other than the independent variable.
 An application of mathematics that describe data.
 A mechanism by which experts in a field carefully screen the work of their colleagues.
5 True/False questions

Random assignment → Characterized by randomly sorting participants into two groups.

Scatterplot → A grouping of points on a twodimensional graph in which each dot represents a single person's data.

Informed consent → Characterized by randomly sorting participants into two groups.

Demand characteristics → The measure of dispersion that takes into account how far each data point is from the mean.

Experimenter bias effect → A phenomenon in which reasercher's hypotheses lead them to unintentionally bias the outcome of a study.