Top-down processing is a perceptual process where the recognition of stimuli is guided by an individual's pre-existing knowledge, experiences, and expectations. This cognitive approach is typically goal-directed, slow, deliberate, and effortful, operating under conscious control to interpret incoming sensory information.

Top-Down Processing

Bottom-up processing is a perceptual process that begins with sensing the basic features of a stimulus from the environment. These individual sensory details are then integrated and built upon to form a complete perception, without the influence of prior knowledge or expectations.

Bottom-Up Processing

Analyze the following scenario. Explain how both the processing of raw sensory information and the influence of prior knowledge and expectations contribute to the individual's changing perception of the object.

Perceptual Interpretation Scenario

Perception operates through two fundamental processing modes. Bottom-up processing is initiated by sensory information from an environmental stimulus, while top-down processing is guided by an individual's pre-existing knowledge and expectations.

University of Toledo

Google

Columbia University

Perception is the complex psychological process of organizing, interpreting, and consciously experiencing sensory information. It involves making sense of the raw data detected by sensory receptors, actively shaping our conscious experience based on focused attention, past experiences, and cultural background.

Perception

Wheeler, M., Arnkoff, D., & Glass, C. (2017). The Neuroscience of Mindfulness: How Mindfulness Alters the Brain and Facilitates Emotion Regulation. Mindfulness, 8(6), 1471-1487.

How Mindfulness Alters the Brain and Facilitates Emotion Regulation

Spielman, R. M., Jenkins, W. J., & Lovett, M. D. (2020, April 22). Psychology (2nd ed.). OpenStax. https://openstax.org/books/psychology-2e/pages/1-introduction

OpenStax Psychology (2nd ed.) Textbook

- Reaction time
- Levels of analysis
- Principle of Neural Representation
- Processing in perception
- Bayesian Inference
- Mental imagery

Focuses of Research on Perception

- Vision 
- Hearing 
- Touch 
- Taste
- Smell
- Pain
- Social 
- Multi-modal
- Sensory Adaptation

Types of Perception

In Buddhism, perception is the process of identifying what the individual experiences by associating historically learned patterns with what is happening.

The Five Aggregates of Clinging: Perception

The body transfer illusion refers to the deceptive sense of ownership over a body that does not belong to oneself. This occurs when bottom-up visual cues override top-down knowledge about body ownership, leading to a false perception of possessing a different body.

Body Transfer Illusion 

Inattentional blindness is when people do not notice certain stimuli in their environment because their attention is elsewhere.

Inattentional Blindness

Perception is an active interpretation of sensory data that is significantly affected by a variety of personal and social factors. An individual's beliefs, values, prejudices, cultural background, and unique life experiences all interact to shape how they consciously perceive the world around them.

Factors Influencing Perception

Processing Modes in Perception

The discrepancy between what sensory receptors detect (sensation) and what is consciously experienced (perception) can be explained by several psychological mechanisms. Concepts such as sensory adaptation, selective attention, and signal detection theory help explain why certain sensory stimuli are perceived while others are not.

Factors Explaining Gaps Between Sensation and Perception

Human perception is not an objective recording of reality; it is a subjective process susceptible to error. Perceptual interpretations can be significantly shaped by an individual's pre-existing biases, prejudices, and other personal factors, demonstrating that what we perceive is not always an accurate reflection of the sensory world.

Fallibility and Bias in Perception

A person who is very afraid of spiders sees a small, dark piece of lint on their bed and momentarily perceives it as a spider, causing a brief panic. Which psychological principle best explains why the piece of lint was interpreted in this way?

Learn Before

Related

Learn After