1. in the Strange Situation, the positive parent–child relationship, in which the child displays confidence when the parent is present, shows mild distress when the parent leaves, and quickly reestablishes contact when the parent returns. Compare insecure attachment. 2. an adult attachment style that combines a positive internal working model of attachment of oneself, characterized by a view of oneself as worthy of love, and a positive internal working model of attachment of others, characterized by the view that others are generally accepting and responsive. Compare dismissive attachment; fearful attachment; preoccupied attachment.
1. a model used in functional magnetic resonance imaging to describe the shape of responses. A neuron receives a number of inputs, each of which comes via a connection that has a strength or weight; these weights correspond to the synaptic efficacy of the neuron. Each neuron also has a single threshold value. Activation of the neuron is determined by the weighted sum of the inputs minus the threshold. The activation signal is passed through a transfer function to produce the output of the neuron. 2. in time-series analysis, a type of model used to forecast a time series that is influenced by present and past values of other time series.