Aspects of problem-solving measured here are delay of gratification, field-dependence independence, and the relection-impulsivity dimension. The following hypotheses are proposed (1) Those subjects who score high on externality will not delay gratification as those who score low, but they will score lower on measures on field-independence than those who score low, they will respond more quickly on measures of reflection and impulsivity than those who score low, and they will commit more errors on this measure than those who score low. (2) There will be no relation between I.Q. scores and degree of externality on the locus of control measures. (3) Significant sex differences will be found on the measure of externality. Findings indicated no significant relation between the locus of control construct and measured aspects of problem-solving abilities. Significant intercorrelations between the dependent variables are found. The data did not indicate significant sex differences. Future research on the locus of control construct is recommended, especially, a specification of what areas of cognitive activities it influences for black youngsters. (Author/AM)