USC Dyslexia Project
Keating-Manis phoneme
deletion test: read description
and get soundfiles here.
Speech Perception Experiments
This page
contains the scripts, sound files, and picture files for the experiments
run with Psyscope. For the
experiments run with Matlab, click
here.
In order
to run the following experiments, you need PsyScope, which runs only on Macintosh
computers.
*** Click here
to download PsyScope (http://psyscope.psy.cmu.edu/files.html).
*** For more
information, go to PsyScope main page (http://psyscope.psy.cmu.edu/)
*** If you can't
read the characters on this webpage clearly, go to view > character set
(for Mac Explorer) or view > character coding (for Netscape) and select
Unversal Alphabet (Unicode, UTF-8).
STEP 1. downloading
and upzipping
1.
Download a zip file.
(e.g., spysky45_discrim.zip)
Choice
of 3 continua, each with 8 stimuli (see Joanisse et al. (2000) or Manis &
Keating (in press) for more information):
Discrimination
Task (AX
discimination, 400 msec ISI, 2 reps of "same" trials for 4 items, 4 reps
of 1-step trials and 4-step trials)
A.
Spy Sky 45 (click here to download "spysky45_discrim.zip"
(500 KB))
B.
Spy Sky 95 (click here to download "spysky95_discrim.zip"
(520 KB))
C.
Dug Tug (click here to download "dugtug_discrim.zip"
(216 KB))
Identification
Task (5
reps of each item, pictures of response choices “spy” and “sky” appear on
screen)
A.
Spy Sky 45 (click here to download "spysky45_ident.zip"
(152 KB))
B.
Spy Sky 95 (click here to download "spysky95_ident.zip"(164
KB))
C.
Dug Tug (click here to download "dugtug_ ident.zip"(228
KB))
2.
Once you unzip the file, you will see a folder with the same name as the
zip file.
(e.g.,
spysky45_discrim)
There
will be various files in the folder. In order to run the experiment you selected,
you will need all of them.
STEP 2. practice trial
1.
You will find a practice test PsyScope file in the folder. The file has the
same name as the folder, with "_prac" added at the end.
(e.g.,
spysky45_discrim_prac) (discrim practice:
2 same and 4 different trials)
2.
You can open the practice test by clicking this file twice or by opening
from the PsyScope pull-down menu (File > Open).
3.
Two windows (a PsyScope command box (Figure A) and a GUI PsyScope script
(Figure B)) will appear. Click "Run" in the PsyScope command box.
Figure
A.
Figure
B.
4.
The experiment will start, with an instruction at the beginning.
5.
In order to run the main experiment (step3), you have to quit the practice
run by clicking "quit" in the PsyScope command box. Or you can simply switch
to the main experiment from the pull-down menu (File > Switch).
6.
The result of the practice test will be stored in a PsyScope file named "experiment
name_prac_data".
(e.g.,
spysky45_discrim_ prac_data)
STEP 3. main experiment
1.
You will find a main experiment PsyScope file in the folder. The file has
the same name as the folder, with "_exp" added at the end.
(e.g.,
spysky45_discrim_exp)
2.
You can open the main experiment by clicking the file twice or by opening
from the PsyScope pull-down menu (File > Open).
3.
Again, two windows will appear. Click "run" in the PsyScope command box.
4.
A console box will appear, asking the name of a subject. Type in the name,
and click "ok".
subject name console box
5.
Another console box will appear, asking the subject number. Type in a number,
and click "ok".
subject number console box
6.
The experiment will start right away, without any instruction.
7.
The result of the main experiment will be stored in a FOLDER, named "experiment
name_data".
(e.g.,
spysky45_discrim_data)
8.
When you finish running the experiment, you will see a result file (a text
file) under the data folder. The file is automatically created with the subject's
name and subject's number that you type in at the beginning of the experiment.
Once you open the result file, you can see the subject's response to each
stimulus, and the reaction time.
This
webpage was created by Sahyang Kim for Pat Keating, July 2004