Flashcards
RMP
Cards in this deck (15)
- 1Validitywhether an instrument measures what it was designed to measure
- 2Reliabilitythe ability of the measure to produce the same results under the same conditions
- 3confounding variableextraneous factors that seem to cause a change in the dependent variable
- 4systematic variationdue to the experimenter doing something in one condition and not the other
- 5unsystematic variationfrom random factors that exist between experimental conditions
- 6skewlack of symmetry
- 7kurtosisPointiness (leptokurtic- positive) (platykurtik - negative flatter)
- 8rangehighest score - lowest score
- 9interquartile rangecut off top and bottom 25% and calculate range of the middle 50% of scores. deals with extreme scores
- 10deviancedifference between each score and the mean (score - mean)
- 11sum of squared errorssome deviations + and some -. square them so all positive. Total deviance squared
- 12variancesum of squared errors divided by degrees of freedom (N - 1). Or: the average squared deviations from the mean
- 13standard deviationsquare root of the variance - tells us how well the mean represents the sample data
- 14z-scoresallow us to compare two scores from different normal distributions by converting data set to have a mean of 0 and a standard deviation of one. z = score - mean divided by sd
- 15causalityfundamental difference between experimental and correlational research
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- Flashcards on RMP, created by James Rowland on 28/12/2015.
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- James Rowland
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