The Presence of Afterimages and the Ability of Some People

question 195

Multiple Choice

The presence of afterimages and the ability of some people with red-green colour blindness to perceive the colour yellow were not consistent with which theory of colour?

• A) Young-Helmholtz trichromatic theory
• B) Weber's law
• C) Hering's opponent-process theory
• D) Hubel-Wiesel feature detector theory

---

Definitions:

Material Price Variance

A calculation that measures the difference between the actual cost of materials and the standard cost multiplied by the quantity purchased.

Purchased Quantity (PQ)

The total amount of a specific item that a company acquires from suppliers within a given time period, used for inventory management and cost control.

Standard Price (SP)

A predetermined cost that companies use as a benchmark to evaluate actual performance or to plan future financial strategies.

Actual Price (AP)

The real price at which a transaction occurs, as opposed to an estimated or theoretical price.