Johnson's IPIP-NEO 120 data repository
Divide into Eight age groups
- 16 - 19
- 20 - 29
- 30 - 39
- 40 - 49
- 50 - 59
- 60 - 69
- 70 - 79
- 80+
To interpret individuals' scores, one might calculate the mean (average) and standard deviation (SD) for a sample of persons, usually of the same sex and a particular age range, and interpret scores within one-half SD of the mean as "average."
Scores outside that range can be interpreted as "low" or "high." If the scores are normally distributed, this would result in approximately 38% of persons being classified as average, about 31% as low, and 31% as high.
We recommend computing means and standard deviations in one’s own sample for reasons explained on the Norms page of the IPIP website.
An alternative method for showing respondents where they stand with respect to a group of respondents is to divide a set of scores into five equal parts, which are called quintiles.
Labels for the scale anchors describe the lowest 20% and highest 20%, the label "average" is used for the middle 20%, and the remaining quintiles are labeled "somewhat."
For example, labels for the quintiles on a scale that ranges from introversion to extraversion would be introverted, somewhat introverted, average, somewhat extraverted, and extraverted.