CSE440 Lecture 07: Human Performance in HCI Methods
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Questions and Answers

What is the primary purpose of creating models?

  • To test predictions and revise the model accordingly (correct)
  • To avoid underfitting and overfitting of the model
  • To capture all possible details of the phenomenon
  • To draw analogies and find patterns in the data

    • What is the fundamental process involved in creating models?

  • Inductive process from specific observations to broader generalization (correct)
  • Devising models and finding patterns in the data
  • Testing fit to data and drawing analogies
  • Observing and collecting data to capture all possible details

    • In the Visual System Model, what happens to the light after passing through the lens?

  • It creates a blind spot in the visual field
  • It gets dispersed and lost in the optic nerves
  • It is focused on the retina and bypasses the brain processing
  • It is captured by the retina and then processed by the brain (correct)

    • What is the Human Processor model primarily concerned with?

    <p>Processing information and making decisions</p> Signup and view all the answers

    What is the key concept addressed by Fitts’s Law?

    <p>The relationship between movement time, distance, and target size</p> Signup and view all the answers

    What is the main purpose of the Gestalt Principles in modeling human performance?

    <p>To explain how humans perceive and interpret visual stimuli</p> Signup and view all the answers

    What is the primary function of rods in the retina?

    <p>Detecting motion in the periphery</p> Signup and view all the answers

    What is the function of cones in the retina?

    <p>Enabling high acuity vision in the central retina</p> Signup and view all the answers

    Which photopigment is most sensitive to long wavelengths?

    <p>Red</p> Signup and view all the answers

    What is the implication of lens yellowing with age on color sensitivity?

    <p>Reduced sensitivity to blue</p> Signup and view all the answers

    How are shapes detected in vision?

    <p>By finding edges using brightness and color difference</p> Signup and view all the answers

    What is the main factor determining brightness in the human visual system?

    <p>Ratio of neural activity stimulation for different photopigments</p> Signup and view all the answers

    What is the primary function of the edge of the retina?

    <p>Detecting motion in the periphery</p> Signup and view all the answers

    What happens to saturated colors (pure colors) in terms of focusing requirements?

    <p>$They require more focusing than desaturated colors$</p> Signup and view all the answers

    What is the distribution pattern of photopigments in the human retina?

    <p>Mainly reds (64%), very few blues (4%) and insensitivity to short wavelengths</p> Signup and view all the answers

    What effect does constant refocusing have on the human visual system?

    <p>It causes fatigue and affects perception of saturated colors</p> Signup and view all the answers

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