Acuity and Retinal Location Lab Part II
- Purpose and Goals
- to measure and see how acuity deteriorates as the stimulus is moved
farther from the fovea
- to gain some experience in calibration or making sure the stimulus works
the way your think it does
- to develop some understanding of what is an experiment
- To begin to learn how to design an experiment to answer a question
- to compare data to hypothesis
- To expand our understanding of Acuity
- Stimulus Type: Vernier
- Number of Positions: Same as for Acuity
- Upper limit of staircase: leave as default but record (the unit is in
- Method (Method of Limits):
- Number of Levels to Test: Same as last time
- Number of staircases: 9-15 (same as last time)
- Type of MOL: Traditional
- Place your head centered on the screen 24" from the monitor surface.
- Fixate on the red fixation mark. Do not move your eyes from that
- Line will be presented
- If you see it, press the yes button or the z key.
- If you do not see it, press the no button or the / key.
- The computer will track the staircases and when each position is done it
will move to the next position.
- The threshold are calculated and a summary of the results will be
displayed at the end of the experiment.
- Press the Show Data button and record your results
Here is the link to the lab.
- Write-up: (Method, Results, Summary)
- Week 1:
- Do a graph of your results to hand in.
- Your graph should be and x-y scatter plot with points connected by straight line connectors
- Put error bars around mean values. See this document by Dr. Darrin Rubino to see how to add error bars.
- Include a paragraph
describing why you graphed the data the way you did.
- Week 2: Abbreviated Lab Report with the following sections:
- Method: Your method must include the following subsections:
- Participants: A brief description of who was in your experiment.
You need data from all members of your group
- Stimulus: A description of all stimuli used and your calibration
- Equipment: What equipment you used
- Procedure: How you collected the data
- Results: a description of your findings
- Use your data and the data from the other member(s) of your group.
- Summary: Do your results match your expectations, listed at the beginning
of this page