On Thursday, we
talked about the ‘Concept’.
Concept:
i.
Basic
units of logical thinking or symbolic knowledge
ii.
An
idea about something that provides a means for understanding the world
iii.
Efficient
processing of information
Two general kinds of concept:
Concrete Concepts
|
Abstract
Concept
|
-Easily
identified by physical appearance
e.g:
House
|
- Underlying notions not readily
observable on the surface.
e.g:
Home
|
Concept Rules:
1.
Simple
: Only one particular feature must be present. For example: red is colour for
an apple.
2. Conjunctive
: Simultaneous presence of two or more common characteristics.
For
example: Aunt --> female
--> mom’s
sister
3. Disjunctive
: Presence of one common characteristic or another or both.
For
example: Schizopheronic person ---> hears voices
---> having distorted beliefs
4.
Hierarcy of
Concept
|
|
Superordinate
|
Vehicles
|
Basic Concepts
|
Boats
|
Subordinate
|
-Sailboat
-Motoboat
-Kayak
|
Feature Based Categories:
i.
Defining
features: Features must be present in all positive instances.
ii.
Correlational
features: Frequently found in positive instance but are not essential for
concept membership.
iii.
Irrelevant
features: Characteristics that are unrelated to membership in the category.
Prototype:
The original
item on which subsequent models are based
For example:
Birds, have feathers.