Podcast
Questions and Answers
What is the Absolute Threshold?
What is the Absolute Threshold?
What is an action in the context of perception?
What is an action in the context of perception?
Motor activities such as moving the head or eyes and locomotion through the environment.
What is an attended stimulus?
What is an attended stimulus?
The stimulus that a person is attending to at a given point in time.
What is Bottom-up processing?
What is Bottom-up processing?
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What are Classical psychological methods?
What are Classical psychological methods?
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What are Cognitive influences on perception?
What are Cognitive influences on perception?
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What is a Difference threshold?
What is a Difference threshold?
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What is an Environmental stimulus?
What is an Environmental stimulus?
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What is Knowledge in the context of perception?
What is Knowledge in the context of perception?
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What is Magnitude estimation?
What is Magnitude estimation?
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What is the Method of adjustment?
What is the Method of adjustment?
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What is the Method of constant stimuli?
What is the Method of constant stimuli?
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What are Methods of limits?
What are Methods of limits?
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What is Neural processing?
What is Neural processing?
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What is Perception?
What is Perception?
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What is the Perceptual process?
What is the Perceptual process?
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What is the Phenomenological approach to perception?
What is the Phenomenological approach to perception?
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What is the Physiological approach to perception?
What is the Physiological approach to perception?
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What is Power Function?
What is Power Function?
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What is the Psychophysical approach to perception?
What is the Psychophysical approach to perception?
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What is Psychophysics?
What is Psychophysics?
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What is the Rat-man Demonstration?
What is the Rat-man Demonstration?
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What is Reaction time?
What is Reaction time?
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What is Recognition?
What is Recognition?
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What is response compression?
What is response compression?
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What is response criterion?
What is response criterion?
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What is response expansion?
What is response expansion?
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What is Signal Detection Theory?
What is Signal Detection Theory?
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What is Steven's Power Law?
What is Steven's Power Law?
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What is Top-down processing?
What is Top-down processing?
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What is Transduction?
What is Transduction?
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What is Visual form agnosia?
What is Visual form agnosia?
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What is Visual search?
What is Visual search?
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What is Weber Fraction?
What is Weber Fraction?
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What is Weber's Law?
What is Weber's Law?
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Study Notes
Key Concepts in Perception
- Absolute Threshold: Minimum stimulus energy required for detection by an observer.
- Action: Motor activities such as head movements and locomotion; perceived outcomes of sensory processing.
- Attended Stimulus: The specific stimulus a person focuses on at any given moment.
Processing Types
- Bottom-up Processing: Constructs perception by analyzing sensory input from receptors.
- Top-down Processing: Begins with high-level cognitive processes, integrating knowledge and expectations into perception.
Methods of Measuring Perception
- Classical Psychological Methods: Techniques to measure thresholds, including the methods of limits, adjustment, and constant stimuli.
- Magnitude Estimation: Assigning numerical values to stimuli based on perceived intensity.
- Method of Adjustment: Observer adjusts stimulus intensity gradually until detection occurs.
- Method of Constant Stimuli: Various constant stimuli are presented in random order to assess thresholds.
- Methods of Limits: Stimuli are presented in alternating ascending and descending sequences to measure detection thresholds.
Influences on Perception
- Cognitive Influences on Perception: Knowledge, memories, and expectations shape how stimuli are perceived.
- Environmental Stimulus: All potential stimuli in the surrounding environment at a particular time.
- Knowledge: Information that influences perception when interacting with stimuli.
Psychophysical Concepts
- Difference Threshold: The smallest detectable difference between two stimuli.
- Psychophysics: Study connecting physical stimuli to psychological responses; encompasses all methods used to explore perception.
- Power Function (Stevens' Power Law): Describes the relationship between perceived magnitude and stimulus intensity, expressed as P=KS^n.
Processes and Measurements
- Neural Processing: The transformation of electrical signals within neural networks.
- Reaction Time: The interval from stimulus presentation to response, indicative of processing speed.
- Response Criterion: The subjective threshold within signal detection, determining when a participant signals a stimulus is present.
- Response Compression/Expansion: Compression occurs when perceived intensity increases less than the physical intensity; expansion is the opposite.
Perceptual Disorders and Strategies
- Visual Form Agnosia: A condition resulting in an inability to recognize objects visually.
- Visual Search: Task of locating a specific element among many in a display.
Theoretical Frameworks
- Signal Detection Theory: Proposes that detection relies on a participant's response criterion rather than just sensory input.
- Weber's Law: States that the ratio of the difference threshold to the stimulus value remains constant across different levels.
- Weber Fraction: This ratio (DL/S) helps quantify perception differences and thresholds relevant to Weber's Law.
Additional Concepts
- Transduction: Conversion of environmental energy into electrical energy within sensory systems.
- Perceptual Process: Series of steps from stimulus detection to recognition and action.
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Description
Test your knowledge with these flashcards covering key terms from Chapter 1 of Psychology. Each card includes definitions of essential concepts such as absolute threshold and attended stimulus. Perfect for reinforcing your understanding of the basics of perception.