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Reference Component Property Method
Word embeddings POS, head POS, dependency relation, gender, case, number, tense Classification
Word embeddings POS, dependency relations, morphological features, emotions Classification
Word embeddings Referential attributes Classification
RNN states/gates POS, syntactic role, gender, case, definiteness, verb form, mood Classification, correlation
RNN states POS, top syntactic sequence, smallest constituent, tense, voice Classification
RNN states/gates Acoustic features Correlation
RNN gates Phoneme boundaries Change in activation signal
RNN states POS, ancestor label prediction, dependency relation prediction Classification
Sentence embeddings Sentence length, word presence, word order Classification
Sentence embeddings Sentence length, word presence, word order; orthography; social tasks Classification
Sentence embeddings Semantic role, word presence Classification
Sentence embeddings Synthetic syntactic patterns Clustering
Sentence embeddings Sentence length, word presence, word order; tree depth, top constituent; main tense, subject/object number, semantic odd man out, coordinate inversion Classification
Sentence embeddings Sentence length, word presence, word order; POS, word sense disambiguation; sentence order Classification
Attention weights POS, word alignment Distribution measures, match with alignments
Attention weights Anaphora Attention score
Attention weights Word sense disambiguation Distribution measures
Hidden activations in feed-forward acoustic model Phonemes, phonetic features, gender Clustering, average activations by group/label
Hidden activations in feed-forward acoustic model Phonemes, phonetic features Classification, clustering measures
CNN/RNN activations Phonetic units Classification
Speaker embeddings Speaker, speech content, word order, utterance length, channel, gender, speaking rate Classification
CNN activations Style, accent, broadcast program Classification
Audio-visual RNN activations Utterance length, word presence, homonym disambiguation Classification, regression, similarity measures
Audio-visual CNN embeddings Word classes Clustering
RNN states in audio-visual model Phonemes, synonyms Classification, clustering, discrimination
Audio-visual CNN activations Phonemes, speakers, word identity Clustering, discrimination
Word embeddings, vision CNN Concepts Similarity measures
RNN states Word presence Direct classification
NMT encoder neurons Sentence length Regression
NMT word embeddings synonyms, morphological features Nearest neighbors
NMT states POS, morphology Classification
NMT states POS, lexical semantics Classification
NMT states Morphology Classification
NMT and LM neurons POS, morphology, lexical semantics Classification
RNN states Subject-verb agreement Likelihood comparison, direct classification
RNN / self-attention states Subject-verb agreement Likelihood comparison, direct classification
RNN states Number agreement Likelihood comparison
Parser word embeddings Word features (shape, etc.) Classification; also other methods
RNN sentence embedding Hierarchical structure Classification
biLM representations (RNN, Transformer, gated CNN) POS, constituency parsing, coreference Classification; similarity scores
RNN states in language-vision model Word boundary, word similarity Classification
Hidden activations in feed-forward audio-visual model Phonetic features Discrimination