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Sport and Exercise Psychology

Zajonc et al. (1969) social facilitation in cockroaches: background and procedure

  • 3 things to know
  • Component 03

Overview

Recall questions on the aim and method of Zajonc et al.'s 1969 cockroach experiments, the earlier finding they reinterpreted, the variables, participants and apparatus of the first experiment, the floodlight and goal box, the audience and control conditions, and timing in the coaction condition.

What you need to know

Answer each one before you reveal it.

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What were the variables in the first experiment?

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Give three controls used in the procedure.

Key term

Why were a bright floodlight and a darkened goal box used?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What was the aim of Zajonc et al.'s research, and what method did they use?

    Model answer

    They aimed to test the drive theory of social facilitation in an animal by showing that the presence of others would improve performance on a simple task while impairing it on a complex one, and they did so through two controlled laboratory experiments using cockroaches.

  2. 2

    Which earlier finding were the researchers responding to, and how did their own theory reinterpret it?

    Model answer

    Gates and Allee had found in 1933 that cockroaches learned a maze more slowly in groups than alone and put this down to distraction, whereas Zajonc's 1965 drive theory reinterpreted it as the presence of others energising the many wrong responses a maze makes available.

  3. 3

    What were the variables in the first experiment?

    Model answer

    The independent variables were the social condition, that is running alone, in a pair as coactors or in front of an audience, and the task, that is a straight runway or a cross-shaped maze, and the dependent variables were starting latency and the time taken to reach the goal box.

  4. 4

    Which participants were used in the first experiment, and how were they divided?

    Model answer

    Seventy-two adult female cockroaches were used, 32 in the coaction part and 40 in the audience part, with half of each running the runway and half the maze, and all had been housed individually in a darkened mason jar for at least a week beforehand with apples available at all times.

  5. 5

    What apparatus was used?

    Model answer

    A clear plexiglass cube 20 inches on each side housed either a straight 20-inch runway or a cross-shaped maze, with a 150-watt floodlight shining along it and a darkened goal box fixed to the far wall.

  6. 6

    Why were a bright floodlight and a darkened goal box used?

    Model answer

    Cockroaches instinctively flee from bright light towards darkness, so the light provided the motivation to run and the dark box provided the destination.

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