morsescales: Morse Code Confusion Scales
Description
Two properties of Morse code signals. Each Morse code signal is a
sequence of up to five 'beeps'. The beeps can be short (0.05 sec) or
long (0.15 sec), and, when there are two or more beeps in a signal,
they are separated by periods of silence (0.05 sec). The two external
variables are:
- Signal type:
- 1: All short beeps
- 2: More short than long beeps
- 3: Same short and long beeps
- 4: More long than short beeps
- 5: All long beeps
- Signal length (in seconds):
1 = .05,
2 = .15,
3 = .25,
4 = .35,
5 = .45,
6 = .55,
7 = .65,
8 = .85,
9 = .95
Format
Matrix of 36 morse codes by 2 properties. The first column contains the morse
code letters.References
Rothkopf, E. Z. (1957). A measure of stimulus similarity and errors in some
paired-associate learning. Journal of Experimental Psychology, 53, 94-101.