Match List-I with List-II :List-I List-II (a) Two-factor theory (i) L.L. Thurstone (b) Group-factor theory (ii) E.L. Thorndike (c) Multi-factor theory (iii) Sternberg (d) Three factor theory (iv) Spearman
(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
Spearman proposed the two-factor theory of intelligence built around general and specific factors, Thurstone gave the group-factor theory of primary mental abilities, Thorndike proposed the multi-factor theory, and Sternberg proposed the three-factor (triarchic) theory of intelligence. The correct match is therefore (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii).