PsychExchange.co.uk Shared Resource

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PsychExchange.co.uk Shared Resource

  1. 1. Related t Test Unrelated t TestParametric or non-parametric? Parametric or non-parametric?Parametric tests are more powerful Parametric tests are more powerfulWhat does the hypothesis predict? What does the hypothesis predict?A test of difference or correlation A test of difference or correlationLevel of measurement Level of measurementnominal, ordinal or interval data nominal, ordinal or interval dataRelated or unrelated? Related or unrelated?Related = a design in which pps are the same Related = a design in which pps are the sameor similar across conditions or similar across conditionsUnrelated = a design in which pps are Unrelated = a design in which pps aredifferent and not matched across conditions different and not matched across conditionsConditions for achieving a significant result Conditions for achieving a significant resultDepending on the test, the observed value Depending on the test, the observed valueneeds to be greater or less than the critical needs to be greater or less than the criticalvalue value
  2. 2. Pearson’s product Moment Test Wilcoxon TestParametric or non-parametric? Parametric or non-parametric?Parametric tests are more powerful Parametric tests are more powerfulWhat does the hypothesis predict? What does the hypothesis predict?A test of difference or correlation A test of difference or correlationLevel of measurement Level of measurementnominal, ordinal or interval data nominal, ordinal or interval dataRelated or unrelated? Related or unrelated?Related = a design in which pps are the same Related = a design in which pps are the sameor similar across conditions or similar across conditionsUnrelated = a design in which pps are Unrelated = a design in which pps aredifferent and not matched across conditions different and not matched across conditionsConditions for achieving a significant result Conditions for achieving a significant resultDepending on the test, the observed value Depending on the test, the observed valueneeds to be greater or less than the critical needs to be greater or less than the criticalvalue value
  3. 3. Mann-Whitney U test Spearman’s testParametric or non-parametric? Parametric or non-parametric?Parametric tests are more powerful Parametric tests are more powerfulWhat does the hypothesis predict? What does the hypothesis predict?A test of difference or correlation A test of difference or correlationLevel of measurement Level of measurementnominal, ordinal or interval data nominal, ordinal or interval dataRelated or unrelated? Related or unrelated?Related = a design in which pps are the same Related = a design in which pps are the sameor similar across conditions or similar across conditionsUnrelated = a design in which pps are Unrelated = a design in which pps aredifferent and not matched across conditions different and not matched across conditionsConditions for achieving a significant result Conditions for achieving a significant resultDepending on the test, the observed value Depending on the test, the observed valueneeds to be greater or less than the critical needs to be greater or less than the criticalvalue value
  4. 4. Chi-squared test Chi-squared testParametric or non-parametric? Parametric or non-parametric?Parametric tests are more powerful Parametric tests are more powerfulWhat does the hypothesis predict? What does the hypothesis predict?A test of difference or correlation A test of difference or correlationLevel of measurement Level of measurementnominal, ordinal or interval data nominal, ordinal or interval dataRelated or unrelated? Related or unrelated?Related = a design in which pps are the same Related = a design in which pps are the sameor similar across conditions or similar across conditionsUnrelated = a design in which pps are Unrelated = a design in which pps aredifferent and not matched across conditions different and not matched across conditionsConditions for achieving a significant result Conditions for achieving a significant resultDepending on the test, the observed value Depending on the test, the observed valueneeds to be greater or less than the critical needs to be greater or less than the criticalvalue value
  5. 5. Sign TestParametric or non-parametric?Parametric tests are more powerfulWhat does the hypothesis predict?A test of difference or correlationLevel of measurementnominal, ordinal or interval dataRelated or unrelated?Related = a design in which pps are the sameor similar across conditionsUnrelated = a design in which pps aredifferent and not matched across conditionsConditions for achieving a significant resultDepending on the test, the observed valueneeds to be greater or less than the criticalvalue

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