Tests on which the 12 males and the 8 male transsexuals differed significantly and might be useful to clinicians for differentiation were the Embedded-figures Test, the Porteus Mazes, and the O'Connor Finger Dexterity Test. Sex differences emerged on the Embedded-figures Test and the first half of the dexterity test. There were no significant differences between 12 males and 14 females or males and 8 transsexuals on conjugate lateral eye movement, eye dominance, Digit Span, and Digit Symbol. Embedded-figures Test appears to tap some aspect of gender identity (males with female identities respond like females) while the first half of the O'Connor taps a biologically determined sex difference (males respond alike whether they have male or female identities).

An experiment is reported using a projective technique to measure displaced aggression following a frustrative task which was preceded by visual sexual stimulation or visual stimulation of a nonsexual nature. Results, which indicated significantly greater manifest aggression in the sexually stimulated group, are discussed in terms of a possible neurohumoral substrate of arousal theory.

Fourth grade children responded to verbal and spatial problems drawn from the Wechsler Intelligence Scale for Children. 24 responded to verbal problems while attending to the right visual field and to spatial problems while attending to the left visual field; 24 fixed attention to the left visual field during verbal problems and to the right visual field during spatial problems. A final 24 children fixed their attention centrally while responding to both sets of problems. There were no significant differences among the groups for verbal performance. Spatial problems were dealt with least effectively during right visual-field eye-fixation. Perhaps right visual-field fixation during a spatial task leads to interference with capacity and from functional distance. Left visual-field fixation might be facilitating as a result of functional closeness but this facilitation is offset by interference with capacity making the over-all result not significantly different from that for the control group. Verbal centers may be insulated against effects of interference.