Deutsch: Fester Quotenplan / Español: Razón fija / Português: Razão fixa / Français: Ratio fixe / Italiano: Rapporto fisso

A fixed ratio is a schedule of reinforcement in psychology where a response is reinforced only after a set number of behaviours have occurred. This predictable pattern is used to shape behaviour by rewarding consistent effort, making it an effective tool for learning and habit formation.

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Fixed-ratio schedule refers to a schedule of reinforcement or punishment in which the reinforcer or punisher is presented after a fixed number of responses (e.g. Lever-presses).

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Fixed-role therapy refers to Kelly's brand of therapy whereby he would assign a role for his clients to play that was distinctly different from the client's self-characterization. With this type of therapy, the therapist acts much like a supporting actor. Please see also Self-characterization.

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Flagellation means striking a partner, often by whipping.

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Deutsch: Flagellum, Geißel / Español: Flagelo / Português: Flagelo / Français: Flagelle / Italiano: Flagello

Flagellum is defined as the tail-like end of a spermatozoon that propels it forward.

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Flashback refers to an overwhelming memory of an event or trauma.

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Flashbulb memories is defined as memories created at times of high emotion that seem especially vivid; one's vivid memory for hearing the news of a surprising event.

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Flat affect refers to apparently emotionless demeanor that include toneless speech and vacant gaze when a reaction would be expected. Flat affect also refers to the observable absence of or minimal presence of facial expression as if the person is unaffected by the contextual environment that surrounds him/her.

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