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Monday, October 18 th , 2010. Objective: Develop an understanding of our senses review of where we are going this unit What is Sensation and Perception View a movie to review where we are going Do Now: Write down our senses and each one’s purpose

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Monday october 18 th 2010

Monday, October 18th, 2010

Objective: Develop an understanding of our senses

review of where we are going this unit

What is Sensation and Perception

View a movie to review where we are going

Do Now:

Write down our senses and each one’s purpose

What do you think sensation and perception mean?

Hand in your Project!

Monday october 18 th 2010

Monday october 18 th 2010

  • Sensation and Perception receptor

    • Sensation and Perception

      • Sensory processing and adaptation

      • Vision

      • The Other Senses:

        • Hearing

        • Touch

        • Taste

        • Smell

      • Perception

      • Subliminal Messages

      • What is real?

Tuesday october 19 th
Tuesday, October 19 receptorth

Today’s Goals

  • discussion of our senses

  • discuss terms used in discussing our sensations

  • Experiment to understand absolute threshold

  • Do Now

    • What are our 6 senses?

  • Homework

    • Evaluating our senses

  • How many senses do we have
    How many senses do we have? receptor

    • The five we always remember, but we really do have a 6th sense….not seeing dead people, but our sense of balance.

    What is the difference
    What is the difference? receptor



    Absolute threshold
    Absolute Threshold receptor

    • The weakest amount of a stimulus necessary to produce a sensation 50% of the time.

    Difference threshold

    The smallest change in a physical stimulus that can be noticed half the time.

    Do you notice another book in your bag if you already have 5 in it?

    Difference Threshold

    Signal detection theory
    Signal detection theory noticed half the time.

    • Study of people’s tendencies to make correct judgments in detecting the presence of stimuli. Combines concept of ability to detect with one’s own judgments.


    Monday october 18 th 2010
    EXAMPLES OF THE SIGNAL DETECTION THEORY noticed half the time.The Classic Radar Operator Example The Shower/Phone Example The Eye Exam

    Weber s law
    Weber’s Law noticed half the time.

    • The larger or stronger a stimulus, the larger the change required for a person to notice that anything has happened to it.

    • This increase in a stimulus need to produce a just-noticable difference is constant:

      dR = C * R

    • "equal relative increments of stimuli are proportional to equal increments of sensation."

    Is the room too dark well to see the same level of improvement
    Is the Room too Dark? noticed half the time.Well, to see the SAME level of improvement…

    • 1 candle x 10 = 10 candles

    • 10 candles x 10 = 100 candles

    • And for the same improvement again,

    • 100 candles x 10 = 1000 candles!

    Monday october 18 th 2010

    EXPERIMENT TIME! noticed half the time.

    Also, handout homework – rank your senses

    Why are we doing this
    Why are we doing this? noticed half the time.

    • Rationale – Psychology is often considered a “hard” (versus “easy” science) because of the complexity of measuring concept of interest. Although one would think that physical stimuli would be easily measured, psychological reaction to a stimuli is not so easily measured. Today, we will evaluate the concept of absolute threshold in order to understand why this is so hard to precisely determine, as well as to further understand how one studies sensation and perception.

    • To determine absolute threshold of the sugar water using two different methods

      • Method of limits – using ascending on descending order

      • Method of Constant Stimuli – using

    Procedure noticed half the time.

    • Break into groups of four

      • subject (blindfolded)

      • Experimenter (hands water to subject)

      • Recorder (Puts results on the worksheet)

      • Math wiz (averages a chart)

    • Supplies

      • blindfold

      • 10 small cups (labeled 1-10)

      • Fill each small cup with samples from the larger cups.

      • calculator

    Monday october 18 th 2010

    • Procedure 1 noticed half the time.(method of limits) – give subject sips in ascending and descending 4 times; average and report mean. Record response of subject.

    • Procedure 2 – Give sips according to preset random order. Record responses

    • Finish any final calculations and report results

    Period 1
    Period 1 noticed half the time.

    Period 9
    Period 9 noticed half the time.