chapter 5 sensation and perception 1

Sherlyn PadillaZuzana Letona

Mariela PachecoAna Paulina Mazariegos

Ely Pineda

When we smell a fragrant flower, are we experimenting sensation or perception?

In everyday language, the terms "sensation" and "perception' are often used interchangeably.

However, as you will see, they are very different complementary processes.

Sensations can be defined as the passive process of bringing information from the outside world into the body and into the brain.

The process is passive because we do not have to be consciously engaging in a "sensing" process.

Sensation doesn't automatically occur; sensory processes must first transform stimulation into neural messages before any other processing is formed.

This process of transferring energy is termed transduction.

Stimuli detectors are important because one of their abilities is to alert us to changes. They also hold authority in sensory adaptation; the absolute threshold, the terminal threshold, and the difference threshold.

ABSOLUTE THRESHOLD: is the lowest level that a person will feel sensation.

DIFFERENTIAL THRESHOLD: is the minimal difference that a person can detect between two stimuli.

TERMINAL THRESHOLD: the intensity of the stimulus is so high above the absolute threshold that it causes the person pain.

The intensity of the stimulus is high enough that the sensory receptors and neurons maybe damaged.

Perception can be defined as the active process of selecting, organizing, and interpreting the information brought to the brain by the senses.

Perception is how one "receives" this feeling or thought, and gives meaning

to it through memories and

emotions.

1) Sensation occurs:a) sensory organs absorb energy from a

physical stimulus in the environment.b) sensory receptors convert this energy into

neural impulses and send them to the brain.

2) Perception follows:a) the brain organizes the information and

translates it into something meaningful.

Sensation: The sense organs register the stimulus – with it's physical properties, "decode" it, and transform it into a neural signal that is then transmitted to the brain.

Perception:In the brain, the neural signal is organized and interpreted. Perception involves "making sense" of our sensations.

https://www.youtube.com/watch?v=0SErqVGcAR0

https://www.youtube.com/watch?v=IDQcFlPqaFs

http://education-portal.com/academy/lesson/intro-to-sensation-and-perception.html#lesson

chapter 5 sensation and perception 1

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