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Unit 1 Concepts

Definitions and/or explanations of most of these terms and concepts can be found in Chapter 1 of the Keppel text. For those not in the Keppel text, try the online texts Hyperstat, StatPrimer, or StatSoft.

  • Exploratory research
  • Descriptive research
  • Explanatory research
  • Experiment
  • Predictive research
  • Research hypothesis
  • Variable
  • Constant
  • Independent variable
  • Dependent variable
  • Treatment variable
  • Task variable
  • Random assignment
  • Environmental variable
  • Classification variable
  • Quasi-Experiment
  • Dependent variable
  • Descriptive statistics
  • Inferential statistics
  • Sample
  • Population
  • Random sampling
  • Availability sampling
  • Confounding variable
  • Nuisance variable
  • Statistic
  • Quantitative independent variable
  • Qualitative independent variable
  • Nominal level of measurement
  • Ordinal level of measurement
  • Interval level of measurement
  • Ratio level of measurement
  • Within-subjects design
  • Between-subjects design
  • Parameter
  • Abcissa
  • Ordinate
  • Subject Mortality
Last Modified 05/15/08