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Environmental Psychology

Vigilance, alarms and the impact of observation in the workplace

  • 3 things to know
  • Component 03

Overview

Recall questions on stimulus-response compatibility, the vigilance decrement, alarm fatigue, signal detection errors, the Hawthorne effect, social facilitation, evaluation apprehension, electronic performance monitoring, and how poor design causes accidents.

What you need to know

Answer each one before you reveal it.

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Key term

Using signal detection terms, describe the two kinds of error a monitoring operator can make.

Key term

Why does the Hawthorne effect matter for research carried out in workplaces?

Key term

What does stimulus-response compatibility mean in workplace design?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What does stimulus-response compatibility mean in workplace design?

    Model answer

    Controls should be arranged and move in the way users expect, such as a dial turning clockwise to increase a value, so responses are fast and errors rare.

  2. 2

    What is the vigilance decrement?

    Model answer

    It is the decline in a person's ability to detect rare signals over a prolonged period of monitoring.

  3. 3

    What is alarm fatigue, and why is it dangerous?

    Model answer

    Constant or frequently false alarms lead staff to ignore or silence them, so a genuine emergency can be missed.

  4. 4

    Using signal detection terms, describe the two kinds of error a monitoring operator can make.

    Model answer

    A miss, in which a real signal goes undetected, and a false alarm, in which the operator responds to a signal that was not there.

  5. 5

    What is the Hawthorne effect?

    Model answer

    It is the tendency for workers' performance to improve simply because they know they are being observed and feel their work is of interest.

  6. 6

    Why does the Hawthorne effect matter for research carried out in workplaces?

    Model answer

    Improvements may be caused by the observation itself rather than by the change being tested, which threatens the validity of the conclusions.

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