When Observers Have Biases Regarding What They Expect Participants' Behavior

question 49

Multiple Choice

When observers have biases regarding what they expect participants' behavior to be like in an experiment,the observations may be influenced by

• A) placebos.
• B) demand characteristics.
• C) experimenter effects.
• D) selective subject loss.

---

Definitions:

Homo Erectus

An extinct species of human that lived between 1.9 million and 143,000 years ago, known for their upright walking ability.

Morphological Traits

Physical characteristics of organisms, such as shape, size, and structure, that can differ significantly within and between species.

Chordates

A large group of animals that includes all vertebrates as well as two groups of invertebrates, characterized by having a notochord at some stage of development.

Common Ancestor

The most recent individual from which all organisms in a group are directly descended.