Measure Your Mind: The Mentimeter and How to Use ItTrabue, Marion Rex
Science
Measure Your Mind: The Mentimeter and How to Use It
Trabue, Marion Rex
Educational tests and measurements; Intelligence tests; Psychological tests
To arrive at a proper perspective for interpreting the score of any
individual, it is necessary first of all to have a _distribution_ of the
scores made by all the persons in the group with which the individual is
to be compared. Such a distribution should show how frequently each
possible score was made. The table on the left illustrates the idea of a
distribution, using as material the scores quoted above for eleven
individuals tested by a Mentimeter test. This table shows that one
person had a score of 10, that one other had a score of 9, and that 3
was the next highest score made. The mode, or most common score, in this
distribution is a 2 or a 3, which fact makes K’s score of 3 appear as
quite typical of his group. The modal or most frequent score is a really
useful score with which to compare the record of any individual,
although it is not as safe a measure of the central tendency of a
distribution as is the median score.
DISTRIBUTION
═════════════╤═════════════
SIZE OF SCORE│ FREQUENCY
─────────────┼─────────────
10│ 1
9│ 1
8│ 0
7│ 0
6│ 0
5│ 0
4│ 0
3│ 3
2│ 3
1│ 1
0│ 2
─────────────┼─────────────
TOTAL │ 11
─────────────┴─────────────
The median score of a distribution is the middle score, than which there
are just as many larger as smaller. The median score is found by
beginning at one end of a distribution and counting through half of the
frequencies. To count through half of the eleven frequencies in the
above distribution would bring us into the midst of the three who had
scores of 2, and therefore 2 is the median score with which K’s score,
or the score of any other individual, should be compared.
Public-domain text, read in full here on John Shaqi.
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