TTR differences between EVAL and FREQ

Veronica Fletcher veronica.n.fletcher at gmail.com
Fri Mar 14 19:06:11 UTC 2025


Hi all,
Our lab is noticing that we receive different Type and Token output values, 
depending on whether our transcripts are run through EVAL (which I believe 
uses FREQ counts to calculate TTR?) versus run directly through the FREQ 
command.

Here is some sample data from Transcript A.  The same file was used for 
both analyses:
FREQ_types (from EVAL): 166
FREQ_tokens (from EVAL): 596
Types (from FREQ): 189
Tokens (from FREQ): 593

What could be accounting for these differences? Apologies if this is a 
silly question - I could not find anything in the CLAN manual that would 
explain this.

Veronica
The Aphasia Network Lab, Northeastern University

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