Tuesday, October 19, 2010

Teaching concept analysis

The following information is from Unit 19 of the book Teaching: A Course in Psychology by Wesley C. Becker, Siegfried Engelmann, and Don R. Thomas. 

Note: Science Research Associates published the book in 1971. I am unsure if the publishers reprinted the book or if it is available to buy. I found it through a university inter-library loan program. I suspect that Becker or Engelmann use the book or some form of it in their special education teaching classes at the University of Oregon.
  • Discriminate or differential responding: in the field of learning, it refers to evidence of responding one way to one class of stimuli and responding another way to another class of stimuli
    • Stimulus generalization: when a person responds to a new stimulus in the same way he responds to a previously taught stimulus that has similar characteristics
      • Example: calling red things “red” and blue things “not red” and then calling orange things “red” also
      • Three factors cause generalization
        • The number of identical stimulus characteristics
        • The number and magnitude of the difference in concept characteristics between two concepts
        • The degree of prior discrimination training with concept differences
      • If you can predict when stimulus generalization may occur, you can prevent or plan for the difficulties
  • Analysis of concept universes
    • Basic concept domains show that concepts from one domain do not share characteristics with concepts from another domain
      • Concept domains
        • Objects (living things, man-made things, etc.)
        • Object properties (mass, heat, state, structure, parts, shape, size, color, surface properties, etc.)
        • Events in time and space (conservation of mass, movement, change in energy, change in group composition)
        • Relationships among events in time and space (cause and effect)
        • Casual relations
      • Teach lower-domain concepts before higher-domain concepts
        • Example: teach what a car is before you teach the color red or the student may think that when you show a red car and say it is red, the student will think that “red” means car
        • Example: the student should know the names and characteristics of things being taught for relative size
        • The idea is to teach the lower concepts with concept instances and non-examples
          • Then teach more complex concepts in comparison to the simple concepts
  • Concept hierarchies: lower order concepts are joined together to form higher order concepts
    • A higher concept has more instances (examples) than a lower concept
    • To teach a hierarchy you teach concepts from two levels at the same time
      • Example: to teach about mammals, teach mammals and not-mammals
        • Then teach sub-groups of mammals
      • Teaching two levels teaches:
        • How concepts are related and teaches
        • How one concept can be an instance of another concept
        • Related concepts and instances need to be carefully discriminated
  • Concept analysis examples
    • Two concept pairs (S+) and (S-) and two other groups of concepts
      • Concepts whose characteristics are irrelevant to the central concept instances (Si)
      • Higher-order concepts whose characteristics are common to the two concepts being analyzed (Sc)
    • Horses vs. dogs example
      • Differences
        • Horses (S+): hooves, large, mane, whinny
        • Dogs (S-): paws, small, no mane, bark
      • Irrelevant stimuli (Si)
        • Both: position
      • Higher order characteristics common to S+ and S- (Sc)
        • Both: Mammary glands, four legs, move, grow, living
    • Police dog vs. wolf
      • Differences
        • Dog (S+): bark, small, dull teeth
        • Wolf (S-): no bark, big, sharp teeth
      • Irrelevant stimuli (Si)
        • Both: position
      • Higher order characteristics common to S+ and S- (Sc)
        • Both: canines, colors, move, grow, living
    • Dog vs. tree example
      • Differences
        • Dog (S+): dog shape, move, noise, legs
        • Tree (S-): tree shape, no moving, no noises, branches
      • Irrelevant stimuli (Si)
        • Both: position
      • Higher order characteristics common to S+ and S- (Sc)
        • Both: grow, living
    • Square vs. triangle example
      • Differences
        • Square (S+): 4 angles, 90 degree angles
        • Triangle (S-): 3 angles, variable angles
      • Irrelevant stimuli (Si)
        • Both: size, position, color, surface pattern
      • Higher order characteristics common to S+ and S- (Sc)
        • Both: closed figures, straight sides
  • To teach concepts
    • If there are many differences between S+ and S-
      • Teach some differences
      • Example: dog and tree
    • If there are few differences between S+ and S-
      • Teach all differences
      • Example: dog and wolf
    • Common characteristics (Sc)
      • Likewise teach more discriminations from S+ to S- if the concepts have few differences
    • Irrelevant characteristics (Si)
      • Make sure to teach most concepts in different angles or positions just in case a student may think that location is relevant
      • Higher order concepts have more irrelevant characteristics
        • The ratio of essential characteristics to irrelevant characteristics shows how abstract a concept is
          • Example: the more Si and the less S+, the more abstract
    • After you analyze the concepts you want to teach, you can group concepts
      • You can determine what is higher-order
      • You can determine teaching sequences

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