Saw this test for inner speech in an article on dyslexia and thought of this thread. Throwing it out there for you to consider.
http://www.dailymail.co.uk/health/article-1263307/Do-hear-voice-head-read-If--dyslexic.htmlFor this you need two people - one asking the questions and the other doing the test. If you find any of this difficult, it may indicate problems with reading.
Ask the person to say numbers one to 26 out loud, then to say them again, but saying one out loud and two and three in their heads, with their tongue clamped between their teeth.
They must not move any part of their body, such as nodding their head or using their fingers.
The correct sequence would be 1, 4, 7, 10, 13, 16, 19, 22, 25. They must complete it within 25 seconds.
Using a pen, tap on the table, say, ten times and ask the other person to count the taps in their head, applying the same rules as above.
P.S. Here's a longer test on the web site:
http://dyslexiavisualldeafauditoryblind.com/yslexiavisualldea.aspx
