TY  - JOUR
PY  - 1980//
TI  - An attempted validation study of the birthdate-based biorhythm (BBB) hypothesis
JO  - Aviation, space, and environmental medicine
A1  - Englund, C. E.
A1  - Naitoh, P.
SP  - 583
EP  - 590
VL  - 51
IS  - 6
N2  - The birthdate-based biorhythm (BBB) hypothesis was examined for utility as a predictor of human performance. Data from quizzes of 26 students taken periodically throughout a semester, and measures over 1 month of landing performance by seven pilots were analyzed by multiple regression/correlation methods. Regression equations were developed to test the correspondence between performance and cycle phases. A second analysis used a nonorthogonal least-square spectrum method to determine if the data contained any systemic rhythms in the intradian range. No significant results were obtained whcih would support the BBB hypothesis as a predictor of human performance. Also, no evidence was found to substantiate the existence of the three proposed BBB cycles.<p /> <p>Language: en</p>
LA  - en
SN  - 0095-6562
UR  - http://dx.doi.org/
ID  - ref1
ER  -