Procedure

Step 1: Starting the Experiment

• Open the experiment interface in your browser.
• Click the Start button to begin the experiment.
• Read the instructions on the screen carefully to understand the task requirements.

Step 2: Randomized Trials

• Trials will consist of two search types:
  • Singleton Search: The target (upright orange "T") differs from the distractors by one feature (e.g., color).
  • Conjunctive Search: The target (upright orange "T") differs from distractors by two features (e.g., color and orientation).
• Trials will appear in a random order to avoid predictability.

Step 3: Performing a Trial

• Observe the search display carefully as it appears on the screen.
• Locate the target object:
  • The target is always an upright orange "T".
• Once you spot the target, press the Spacebar as quickly as possible to indicate its presence within 5 secs.
• Note: If you don't see the target, do not press the Spacebar for 5 seconds, and the trial will automatically end.

Step 4: Varying Set Sizes

• The number of objects (set size) will vary during the experiment to increase difficulty.
• Set sizes will incrementally increase (e.g., 5, 10, 15, 20 objects).
• Pay attention to the increasing challenge as the set size grows.

Step 5: Data Collection

• For each trial, the following data will be recorded:
  • Trial Type: Singleton or Conjunctive search.
  • Set Size: Number of objects displayed.
  • Response Time: Time taken to press the spacebar after the display appears.
  • Accuracy: Whether the target was correctly identified.

Step 6: Completing the Experiment

• Continue performing trials until all randomized trials are completed.
• The experiment will automatically stop after the predefined number of trials.
• At the end of the experiment, your performance results will be displayed:
  • Average search time for Singleton and Conjunctive trials.
  • Overall accuracy across all trials.