What Did Bibb Latané and John Darley (1968)do to Ensure

question 91

Multiple Choice

What did Bibb Latané and John Darley (1968) do to ensure the internal validity of their laboratory experiment on the effects of the number of bystanders on participants' responses to an emergency? They

• A) randomly sampled participants for the study.
• B) made sure that the groups had the exact same number of men and women.
• C) let participants choose what experimental condition they wanted to be in. .
• D) asked participants about their knowledge about epilepsy before beginning the experiment.
• E) assigned participants at random to conditions that were exactly the same except for one key variable.

---

Definitions:

Hypothesis

A testable statement about the nature of an observation or relationship. Compare with scientific theory.

Decomposers

Microbial heterotrophs that break down dead organic material and use the decomposition products as a source of energy. Also called saprotrophs or saprobes.

Ecosystem

A community of living organisms in conjunction with the nonliving components of their environment, interacting as a system.

Available Nutrients

Nutrients present in the environment that can be readily absorbed and used by organisms for growth and metabolism.