{(Birthdate and intelligence in sub-normal patients}[14th March 1989]

[Redbook6:113)][19890314:2305]{(Birthdate and intelligence in sub-normal patients}[14th March 1989]

.2305

Research results* suggesting a link between season of birth and intelligence,** although not always replicated, follow this pattern:***

[Text extracted from ms diagram reproduced above:]

4th

(51.7)

Winter

|

C

21/12

Autumn

2nd

(54.6)

–

G~

21/3

+

23/9

M~

–

3rd

(53.1)

Spring

21/6

A~

|

Summer

1st

(57.1)

The figure is the mean I.Q.

If this difference exists and is in fact dependent on climate, then it is only what might be described as a derivative or secondary cycle, not a fundamental or primary cycle.

*E[ncIyclopaedia] B[ritannica] Instant Research Service: ‘The Relationship Between Season of Birth, Intelligence and Emotional Health’ (Extract from reports)

Orme, J.E., ‘An Ante-Natal Determination of Intelligence’, Nature (London), December 1963, page 1239

**for sub-normal patients

***(I assume the dates for seasons, since these were not given)

[continues]

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