Dr Mentor Is Conducting an Experiment Examining the Effects of Cell

question 209

Multiple Choice

Dr. Mentor is conducting an experiment examining the effects of cell phone conversations on reaction times while driving a car. Each participant, either conversing on a cell phone or not, manoeuvres a driving course on a simulator. This simulated drive is videotaped. The research assistant hired to do the coding of the video tapes does not
Believe cell phone use should be banned while driving a motor vehicle and tends to err in the coding of the reaction times in a way that favours this belief. This experimenter
Expectancy effect could be controlled by:

• A) the placebo effect
• B) improved external validity
• C) counterbalancing
• D) the double-blind procedure

---

Definitions:

Hydrothermal Vents

Openings on the seafloor that emit hot, mineral-rich water, supporting unique ecosystems independent of sunlight.

Giant Worm Tubes

Large tubular structures created by certain species of marine worms, which serve as their protective habitats on the ocean floor.

H2S

hydrogen sulfide, a toxic, flammable gas with a characteristic odor of rotten eggs, found in many natural and man-made environments.

Mid-Ocean Ridges

Undersea mountain ranges formed by the upwelling of magma as tectonic plates diverge, where new oceanic crust is created.