Reply by Jerome Kagan to a recent article by Block, Gjerde, and Block (1986) which questions the validity of the construct of reflection-impulsivity. Kagan alleges flaws in the logic of the authors' (Block, Gjerde, Block) position and in the inferences drawn from their data. (Author/RWB)

Responds to the arguments and evidence adduced by Kagan (1987) in his reply to the Block, Gjerde, and Block (1986) study questioning the validity of the Matching Familiar Figures Test (MFFT) as a measure of "reflection-impulsivity." (Author)

How soon does a child learn to discriminate orthographic units in his written language as distinguished from a general form-discrimination ability. A discrimination test of letters, words, or characters, in three written languages, Chinese, Hindi, and English, at three age levels, from four to five and a half years was given to 153 middle class…