Contrast Sensitivity Function
SPA Lab 4: CONTRAST SENSITIVITY FUNCTION
Ciara Dubose
University of Central Oklahoma
Abstract
The purpose for this experiment is to determine at which spatial frequency does a participant’s visual acuity for a contrast sensitivity function display a peak performance across different sine – wave gratings. The ability to contrast sensitivity is useful in everyday life, more than people imagine. These contrast sensitivity functions focus primarily on the participants’ ability to detect accurately the presence of a sine – wave grating across different levels of contrast. The one way repeated participants design indicated there was a reliable effect of spatial frequency on contrast sensitivity. The conclusions of this experiment suggest rejecting the null hypothesis that spatial frequency will produce no significant effect on contrast sensitivity.
SPA Lab 4: CONTRAST SENSIVITY FUNCTION
The purpose for this experiment is to distinguish the spatial frequency at which a participant’s contrast sensitivity peaks (Schieber, 2010). The issue of interest for this experiment is to determine the level of spatial frequency that contrast sensitivity is most accurate. The contrast sensitivity function is important because it allows the experimenter to measure the participant’s ability to determine the presence of differing sine – wave gratings (Coren, Ward, & Enns, 2003). This particular contrast sensitivity function measures the ability to perceive low – contrast targets over a wide range of different frequencies and dimensions (Schieber, 2010). One modern day example of an audition contrast sensitivity function is when a person is performing sound gating, or filtering out the unnecessary background noise from a recording by setting a predetermined level at which the sounds are to be interpreted as noise.
This experiment used the different levels of spatial frequencies for sine – wave gratings to assist in measuring visual acuity using contrast sensitivity
Ciara Dubose
University of Central Oklahoma
Abstract
The purpose for this experiment is to determine at which spatial frequency does a participant’s visual acuity for a contrast sensitivity function display a peak performance across different sine – wave gratings. The ability to contrast sensitivity is useful in everyday life, more than people imagine. These contrast sensitivity functions focus primarily on the participants’ ability to detect accurately the presence of a sine – wave grating across different levels of contrast. The one way repeated participants design indicated there was a reliable effect of spatial frequency on contrast sensitivity. The conclusions of this experiment suggest rejecting the null hypothesis that spatial frequency will produce no significant effect on contrast sensitivity.
SPA Lab 4: CONTRAST SENSIVITY FUNCTION
The purpose for this experiment is to distinguish the spatial frequency at which a participant’s contrast sensitivity peaks (Schieber, 2010). The issue of interest for this experiment is to determine the level of spatial frequency that contrast sensitivity is most accurate. The contrast sensitivity function is important because it allows the experimenter to measure the participant’s ability to determine the presence of differing sine – wave gratings (Coren, Ward, & Enns, 2003). This particular contrast sensitivity function measures the ability to perceive low – contrast targets over a wide range of different frequencies and dimensions (Schieber, 2010). One modern day example of an audition contrast sensitivity function is when a person is performing sound gating, or filtering out the unnecessary background noise from a recording by setting a predetermined level at which the sounds are to be interpreted as noise.
This experiment used the different levels of spatial frequencies for sine – wave gratings to assist in measuring visual acuity using contrast sensitivity
References: Coren, S., Ward, L. M., Enns, J. T. (2003) Attention. Sensation and Perception. (6th ed., pp. 388-419). Hoboken, NJ: Wiley. Schieber, F. (2010). USD Internet Sensation & Perception Laboratory Contrast Sensitivity Function. Retrieved from URL:http://people.usd.edu/~schieber/coglab/coglabmain.html. .