TTR differences between EVAL and FREQ

[Leonid Spektor]

Hi Veronica,

	EVAL counts words on %mor tier and default FREQ command counts words on speaker tier. If your data has a lot of contractions words, then numbers will be different. For example, word (can't) will counted by FREQ as 1 word. But, because on %mor tier this word is represented as (can) and (not) EVAL will count it as 2 words.

You can see the difference if you run FREQ command on %mor tier. For example, command "freq +t%mor ..."


Leonid.

> On Mar 14, 2025, at 15:06, Veronica Fletcher <veronica.n.fletcher at gmail.com> wrote:
> 
> 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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