It’s not among these ones in https://www.abbreviations.com/acronyms/psychology/99999
or it is not in alphabetical order and I tried Ctrl F (TBS, and TBS psychology).
https://acronyms.thefreedictionary.com/TBS
TAT TC TEAB
TEACUP TEP TFETMG THOS TIRC
TIRF TJ TMD TMMS TMV
TPI TPIG TRS TSST

Order entered into their database, would be my guess.

Found it on this site, but not alphabetical order.

Is this for yourself, Flo? I think it’s supposed to be for children or youth.

My guess would be that the order is based on frequency of use.

@Zaku and @LostInParadise Ok, but couldn’t it automatically be listed in alphabetical order?
@raum But I don’t mind if it’s supposed to be for children or youth or not as long as it’s usable. If Is it supposed to be user unfriendly just because it is supposed to be for children or youth? By the way what makes it for children or youth?

…@raum what did you do to exactly to find it in the link you posted? What search terms including punctuation? I tried Ctrl F and just resgular search and it didn’t show up.

Of what use would it be to have a listing in alphabetical order, since you don’t know what you are looking for? Listing by use frequency makes a whole lot more sense.