Welcome to the Visual Search Experiment

Before we begin the experiment, we need to collect some information about you.

1. Indicate your gender: Female Male Non-binary Other

2. Indicate your hand preference: Right-handed Left-handed Ambidextrous

3. Choose your course section:

Hope College PsychLabs: Visual Search Experiment

General Instructions

Introducing the Visual Search Experiment

This experiment is designed to measure how long it takes people to search for a visual target and decide whether the target is present or absent.

On each trial you will see a group of small colored shapes—blue squares, blue triangles, orange triangles, and sometimes a single orange square, which is the visual "target."

Your task is simple: You must search for the orange square, and press a key to indicate whether the target orange square is present or absent.

Hope College PsychLabs: Visual Search Experiment

General Instructions Page 2

When the Target is Present

On half the trials the target -- the orange square -- will be present, as shown in these examples.

If the target is present, you should press the "M" key as quickly as possible to indicate a "match."

Hope College PsychLabs: Visual Search Experiment

General Instructions Page 3

When the Target is Absent

On half the trials the target -- the orange square -- will be missing, as shown in these examples.

If the target is absent, you should press the "N" key as quickly as possible to indicate "no match."

To familiarize you with the task, we will begin with some Practice Trials.

Hope College PsychLabs: Visual Search Experiment

PRACTICE TRIALS

Instructions for Practice Trials

Now you will go through 8 Practice Trials. Please place your left index finger on the N key and your right index finger on the M key. You will begin each trial by pressing the SPACE BAR with your thumb.

On each trial you must decide whether the target -- the orange square -- is present or absent.

If the target is present, press the M ("match") key. If the target is absent, press the N ("no match") key. Please try to press the key as quickly as you can without making mistakes.

When you are ready to begin the 8 Practice Trials, press the "Begin Practice Trials" button.

Hope College PsychLabs: Visual Search Experiment

TEST TRIALS

Instructions for Test Trials

Now you will go through 40 Test Trials. Please place your left index finger on the N key and your right index finger on the M key. You will begin each trial by pressing the SPACE BAR with your thumb.

On each trial you must decide whether the target -- the orange square -- is present or absent.

If the target is present, press the M ("match") key. If the target is absent, press the N ("no match") key. Please try to press the key as quickly as you can without making mistakes.

When you are ready to begin the 40 Test Trials, press the "Begin Test Trials" button.

Hope College PsychLabs: Visual Search Experiment

PRACTICE TRIAL P 1

Hope College PsychLabs: Visual Search Experiment

Your Results

Mean RT in milliseconds

	Single Feature	Conjunctive Features	Overall
4 Objects
16 Objects
Overall

Percent Correct

	Single Feature	Conjunctive Features	Overall
4 Objects
16 Objects
Overall

Before you move on, copy your results to your data sheet.

Hope College PsychLabs: Visual Search Experiment

Finished

This concludes the Visual Search Experiment.

Thank you for your participation!

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Session ending . . .
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Hope College PsychLabs: Visual Search Experiment