Conclusion

Subject across 5 measures of fluid intelligence (+10 +25 +16 +8 +4) - mean increase of 12.6 (p=0.026, paired t-test)

Control across 5 measures of fluid intelligence (+7 0 +4 +6 -1) mean increase of 3.2 (p=0.79, paired t-test)

Subject contiguous intelligence measure 28 (post) → 38 (during) → 39 (post)

Post → During 4.6e-05, 7.7e-0.5 (tstt, mwu - significant both)

During → Post 0.5, 0.9 (tstt, mwu - not significant both)

Pre → Post 4.5e-06, 0.005 (tstt, mwu - significant both)

Design

Control and subject lived in the same house and took the tests 25 days apart, with the subject undergoing 14 days of intervention between the first and last test with 1 day pause and the control living life ad libidem.

Both the control and the subject are healthy men (27 and 28 yo - BMI between 21 and 23) and often shared food as well as exercise sessions which controls for diet and activity baseline. Their cognitive abilities are roughly equivalent as assessed by both peers and the tests ran.

Incentive:

• Control had no incentive on the first tests and monetary incentive for each extra point scored on the secondary test.
• Subject has an incentive for the second test’s result to be higher but also to obtain a high result initially for the findings to apply to his target demographic (people within 1-3 std of IQ)

The incentive landscape is flawed but the design tries to make it be more reasonable.

Tests were taken at roughly the same time of day (3 hours earlier for the control and 1 hour later for the subject)