Intro to Sensation Perception Briefly describe each picture

Intro to Sensation & Perception

Briefly describe each picture.

Turn-and-Talk �How can a group of people look at the same pictures and understand each differently?

Sensation �Definition: when a stimulus activates a receptor of a sense organ; awareness of changing conditions Stimulus—something that causes a bodily response Ex: light—retina, sound—hair cells, pressure—skin, etc. �What are the five most well-known senses? (there are many more)

Understanding Senses Articles �Choose one of the articles describing the experiences of someone lacking one/two of their main senses �Prompt #1: How is their life different than most? Support with at least 3 specific examples. What is something you wonder about this experience of lacking one/two of your senses? (can be of your reading or in general) As you share, write down one experience that stood out about each of the other articles

Sensation �Definition: when a stimulus activates a sense organ’s receptors; awareness of changing conditions Stimulus—something that causes a bodily response Ex: light—retina, sound—hair cells, pressure—skin, etc.

Sensory Threshold �Absolute threshold—weakest amount of a stimulus required to produce a sensation Detected 50% of the time �For the 5 main senses (1942 study): (do not write) Vision—candle flame 30 miles away on a clear night Hearing—watch ticking 20 feet away Taste—tasting 1 tsp of sugar dissolved in 2 gallons of water Smell—smelling 1 drop of perfume in a 3 -room house Touch—feeling a bee’s wing falling a distance of 1 cm onto your cheek

Sensory Threshold Test your Threshold: http: //www. noiseaddicts. com /2009/03/can-you-hear-thishearing-test/ �Difference threshold—minimum amount of difference a person can detect between two stimuli Ex: Optometrist—testing your vision �Weber’s Law—the larger/stronger a stimulus, the greater the change needed to notice any difference Ex: weight in a backpack

Sensory Adaptation �Definition: get used to a new level and respond only to changes away from it �Ex: What happens to your vision when you are in a movie theater? What happens to your body when you go swimming in a cold lake? What happened when you walked in and smell really strong perfume?

Sensory Adaptation What is the purpose of sensory adaptation?

Signal-Detection Theory �Signal-Detection Theory—tendency to detect the presence of stimuli correctly due to motivation, skill, and competing stimuli Argues against a single threshold �Preattentive (automatic) vs. attentive (careful attention) processing

The Stroop Effect Which was more difficult? Why?

Concepts Chart—separate sheet Absolute Threshold Explain in your own words Ex: Draw an image Difference Threshold Weber’s Law Sensory Adaptation Signal. Detection Theory