Periodic variations in efficiency : as shown in mental and physical tests, together with some weather effects / by Archibald G. Peaks.

  • Peaks, Archibald G. (Archibald Garfield), 1880-1918.
Date:
1921
Catalogue details

Licence: In copyright

Credit: Periodic variations in efficiency : as shown in mental and physical tests, together with some weather effects / by Archibald G. Peaks. Source: Wellcome Collection.

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    CONTENTS Preface . ] I. Growth Rythms .•. 5 II. Seasonal Periodicity in Mental and Physical Abilities 1— Periodicity of Attention (Schuyten).•.9 2— Periodicity in Muscle Strength (Schuyten) . 13 3— Periodicity in Primary Memory (Lobsien) . 15 4— Periodicity in Strength and Endurance (Lehman and Pedersen) . 19 5— Seasonal Variations in Diurnal Periodicity (Kuhnes) 25 6— Summary of Problems and Results in Seasonal Periodicity . 27 III. An Original Experimental Study in Seasonal Period¬ icity 1— Introduction . 29 2— Periodicity as shown in Physical Tests. 29 3— Periodicity as shown in Primary Memory Tests. 33 4— Comparisons of Mental and Physical Seasonal Periodicity . 36 IV. Diurnal Variations in Efficiency 1— Introduction . 48 2— Daily Variations in Voluntary Muscular Contrac¬ tion (Storey) . 49 3— The Diurnal Course of Efficiency (Marsh). 50 4— Diurnal Variations and Exercise Effects (Lehman and Pedersen) . 52 5— Diurnal Variations in Muscular Energy (Kuhnes)_ 53 6— Variations in Efficiency During the Day (Gates). 54 7— Diurnal Variations in Memory and Association (Gates) .••••••. 57 8— Summary of Problems and Results in Diurnal Periodicity . 58 9— Diurnal Periodicity in my Orginal Experimental Investigations . 59 V. —Other Periodic Variations 1— Introduction . 61 2— Twenty-eight Day Periodicity. 61 3— Twenty-three Day Periodicity. 62 4— Weekly Periodicity. 63 5— Weekly Periodicity in my Original Experimental Investigations . 64