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5 Written questions

5 Matching questions

  1. Confounding variable
  2. Random selection
  3. Independent variable
  4. Practical significance
  5. Scatterplot
  1. a A grouping of points on a two-dimensional graph in which each dot represents a single person's data.
  2. b The treatment or intervention that the experimenter "manipulates" or varies.
  3. c It has a real-worl importance.
  4. d Any difference between the experimental and control groups other than the independent variable.
  5. e A procedure that ensures every person in a population has an equal chance of being chosen to participate.

5 Multiple choice questions

  1. A mechanism by which experts in a field carefully screen the work of their colleagues.
  2. A heuristic that includes estimating the likelihood of an occurance based on the case with which it comes to our minds.
  3. The extent to which a measure assesses what it claims to measure.
  4. A perception of a statistical association between two variables where none exists.
  5. Characterized by randomly sorting participants into two groups.

5 True/False questions

  1. Internal validityThe extent to which we can draw cause-and effect inferences from a study.


  2. Experimenter bias effectA phenomenon in which reasercher's hypotheses lead them to unintentionally bias the outcome of a study.


  3. Experimental groupA research design characterized by random assignment of participants to conditions and manipulation of an independent variable.


  4. Control groupA systematic error in thinking.


  5. Base rateA research design that examines one person or a small number of people in depth, often over an extended time period.