Podcast
Questions and Answers
How long should the tachistoscope expose each card?
How long should the tachistoscope expose each card?
About 1/10 of a second.
What should the subject do when instructed to look at the fixation board?
What should the subject do when instructed to look at the fixation board?
They should look attentively at the center of the board.
What is the task of the subject after viewing the exposed card?
What is the task of the subject after viewing the exposed card?
They have to write the content seen on the response sheet.
How should the material on the cards be presented to the subject?
How should the material on the cards be presented to the subject?
What is the purpose of allowing a one-minute interval between trials?
What is the purpose of allowing a one-minute interval between trials?
What should be clearly visible before the subject begins the task?
What should be clearly visible before the subject begins the task?
What instruction is given to the subject before each card presentation?
What instruction is given to the subject before each card presentation?
How long should the subject be seated in front of the tachistoscope?
How long should the subject be seated in front of the tachistoscope?
Why is it important to change the card after each trial?
Why is it important to change the card after each trial?
What type of content is shown on the cards?
What type of content is shown on the cards?
Flashcards
Tachistoscope Exposure Time
Tachistoscope Exposure Time
The tachistoscope should be adjusted to expose stimuli for approximately 1/10 of a second.
Subject Position
Subject Position
The subject should be seated comfortably in front of the tachistoscope, with the exposed material clearly visible.
Subject Instructions
Subject Instructions
The subject is instructed to look attentively at a fixation point while unrelated letters/words are flashed for a fraction of a second, then write down what they saw.
Card Presentation
Card Presentation
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Ready Signal
Ready Signal
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Exposure Duration
Exposure Duration
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Response Time
Response Time
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Card Changes
Card Changes
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Rest Period
Rest Period
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Stimuli Content
Stimuli Content
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Study Notes
Tachistoscope Procedure
- Adjust the tachistoscope for a 1/10th of a second exposure.
- Subject sits comfortably facing the tachistoscope, ensuring clear visibility of the exposed material.
- Instructions: Subject will focus on a fixation point; a card with letters/words will appear briefly (1/10 second), then they must write down what they saw on a response sheet.
- Cards are placed behind the tachistoscope, unseen by the subject until ready.
- The shutter of the tachistoscope is raised to expose the card for 1/10th of a second before returning to the neutral position.
- After each exposure, allow sufficient time for writing down the observed material, ensuring sufficient time interval between exposures to mitigate eyestrain (about one minute).
- Cards must be presented in the order exposed.
References
- Anastasi, A., & Drake, J. D. (1954). An empirical comparison of certain techniques for estimating the reliability of speeded tests.
- Ans, B., Carbonnel, S., & Valdois, S. (1998). A connectionist multiple-trace memory model for polysyllabic word reading.
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