The Belief That Homo Erectus Evolved Along Different Paths in Different

question 50

Multiple Choice

The belief that Homo erectus evolved along different paths in different regions based on local selection pressures is which model of evolution?

• A) classic
• B) retroactive
• C) multiregional
• D) migratory
• E) African emergence

---

Definitions:

Primary Reinforcement

Primary Reinforcement involves a stimulus that satisfies a basic survival need and is inherently reinforcing, such as food or water.

Secondary Reinforcement

A type of reinforcement that has acquired its reinforcing properties through association with primary reinforcers, such as money or praise.

Variable-Interval Schedule

A type of reinforcement schedule where reinforcements are provided at unpredictable time intervals, promoting steady response rates.

Postreinforcement Pause

A moment of no response or inactivity that occurs just after reinforcement in a fixed-interval schedule of reinforcement in operant conditioning.