Final Specs for OCCLUDE1 Program

 

 

Program Operation

 

Six images are shown in the same order every time.

 

PICTURE                    IN ORDER CONDITION 1                  IN ORDER CONDITION 2

 

1                                  Continuous                                          Hidden/Unhidden

 

2                                  Hidden/Unhidden                                 Continuous

 

3                                  Continuous                                          Hidden/Unhidden

 

4                                  Hidden/Unhidden                                 Continuous

 

5                                  Continuous                                          Hidden/Unhidden

 

6                                  Hidden/Unhidden                                 Continuous

 

 

There are two conditions, Continuous and Hidden/Unhidden:

 

1. Continuous

 

The picture is shown for thirty seconds.

 

 

2. Hidden/Unhidden

 

The picture is also shown for thirty seconds.

However, the entire picture is only visible for four seconds at a time.

After those four seconds are up, a portion of the picture is hidden by a black box.

The user may see this box for as long as they please. They may also make it disappear by “Toggling” (pressing the Spacebar).

After Toggling (pressing the Spacebar), they may again see the whole picture for only 4 seconds before another portion is hidden.

 

The location of the black boxes, or “Zones,” is as follows:

 

The Zones are picked independently and randomly except that Zones cannot be repeated with a spacing less than 3. That is, when a Zone is picked it must be different than the two Zones picked before it.

 

 

General

 

Before each picture is displayed the program pauses for three seconds then displays either “The next picture will be exposed continuously for 30 seconds” or “The next picture will be hidden/unhidden.”

 

At the end of the study the program displays “Thank you very much for participating – Please call your experimenter for your memory test.”

 

 

Data File

 

Here is an example of a raw data file generated:

 

#Trial_Number

Order_Condition

Picture

Hidden

Toggles

Zone_Order

 

 

 

 

 

 

 

 

 

 

 

 

1

1

picture1.jpg

Unhidden

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

1

picture2.jpg

Hidden

14

6

2

1

5

3

2

3

6

5

1

2

6

4

1

3

1

picture3.jpg

Unhidden

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

1

picture4.jpg

Hidden

11

5

2

4

6

5

2

3

1

6

2

2

 

 

 

5

1

picture5.jpg

Unhidden

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

1

picture6.jpg

Hidden

11

6

3

1

2

5

4

3

2

6

4

3

 

 

 

 

Note that:

 

1.  “Unhidden” means Continuous and “Hidden” means Hidden/Unhidden by the terminology above.

 

2. “Picture” is the filename of the picture actually displayed.

 

3. “Toggles” is a record of the number of Toggles the user did (the number of times he/she pressed the spacebar).

 

4. “Zone_Order” is a listing of every zone hidden in the order they were hidden.