Study 2 Registration: Exploring representational counterparts of welfare-relevant indicators under post-training quantization

Epistemic status: this is intended as a higher-quality preregistration for the next study in a series originally described in "Does post-training quantization change welfare-relevant indicators in open-weight language models?"; I have tried to avoid making any claims I cannot support from the results of Study 1 and to be entirely clear about which statements here are speculative, but if any statement is ambiguous you should assume it is hypothesis rather than conclusion.We ask whether welfare-re...