BUG: Unspecified VisualFeedbackColor parameter in TETWaitForFixation still presents visual feedback [31042]

This article applies to:

E-Prime Extensions for Tobii Pro 3.2

E-Prime Extensions for Tobii Pro 3.1

E-Prime Extensions for Tobii Pro 3.0

E-Prime Extensions for Tobii Pro 2.0

Symptoms

A visual feedback is presented as a black border around the fixation sub-object when fixated upon, even when the vVisualFeedbackColor parameter in the WaitForFixation routine is unspecified (blank).

Detail

When the vVisualFeedbackColor parameter is unspecified, no visual feedback should be shown to participants. However, a black BorderColor is shown when the vKey parameter is specified.

For example, vVisualFeedbackColor does not present visual feedback with the following. Notice that vVisualFeedbackColor is unspecified (blank):

c, Fixation, 2000

However, once the vKey parameter is specified to an appropriate value, black visual feedback appears for the vVisualFeedbackColor parameter regardless of it being unspecified:

c, Fixation, 2000, ,"1"

Workaround

There are two workarounds for this bug:

1. Do not specify either the vVisualFeedbackColor or vKey parameters.
2. Specify the vVisualFeedbackColor parameter as a color that matches the Fixation Slide's BackColor. For example, if the Slide's BackColor is "green", then "green" needs to be specified for vVisualFeedbackColor.

See Also:

RELEASE INFO: E-Prime Extensions for Tobii Pro 3.2 Known Issues [28931]