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Now imagine that you want to sign the letter T, but you sign this instead:

The letter S in ASL

What happened?

Hint: What letter did you actually sign? How similar is it to T in ASL?

This letter is S, which looks pretty similar to T. As a reminder:

The letter S in ASL

This is a

S

The letter T in ASL

This is a

T

So as you might have figured out, it would be relatively easy to accidentally sign an S instead of a T, even if you know the correct way to sign both letters.

This is the big idea behind our final parameter, P(slip), which is the probability that a student makes a mistake or "slips up" (e.g., answering a question incorrectly even when you know the correct answer).

Let's take a look at the full ASL alphabet. What other letters might increase a student's P(slip)?

The letter A in ASL

A

The letter B in ASL

B

The letter C in ASL

C

The letter D in ASL

D

The letter E in ASL

E

The letter F in ASL

F

The letter G in ASL

G

The letter H in ASL

H

The letter I in ASL

I

The letter J in ASL

J

The letter K in ASL

K

The letter L in ASL

L

The letter M in ASL

M

The letter N in ASL

N

The letter O in ASL

O

The letter P in ASL

P

The letter Q in ASL

Q

The letter R in ASL

R

The letter S in ASL

S

The letter T in ASL

T

The letter U in ASL

U

The letter V in ASL

V

The letter W in ASL

W

The letter X in ASL

X

The letter Y in ASL

Y

The letter Z in ASL

Z

Click to fill in the blanks!

The letters

and

might be easily confused for one another, thus increasing a student's P(slip).

Some possible answers: G + H, M + N, U + V. Great job!

Optional: Try signing your name before you move on!

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