Contents: Cognitive Psychology -- Memory and connectivity in immune and neural network models; Expectancy-learning and evaluative learning in human classical conditioning: differential effects of extinction; Development of the ability to judge relative areas: young children's spontaneous use of superimposition as a cognitive tool; Counting in mentally retarded adolescents; Foundations of human causal reasoning. Behavioural Psychology -- Computer-mediated communication: a tool for public health; A barrier for healthy activity; The role of differentiated group experience in the course of inpatient psychotherapy; The assessment of dangerous behaviour. Biological Psychology -- Optimising blood pressure reduction in mild un-medicated hypertensives.