ego boundary

1. the concept that individuals are able to distinguish between self and not-self. Someone who is said to lack clear ego boundaries blurs the distinction between himself or herself and others by identifying with them too easily and too much.

2. in psychoanalysis, the boundary between the ego and the id (the internal boundary) or between the ego and external reality (the external boundary).

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Psychology term of the day

September 1st 2024

transfer function model

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.