1. Topics in AI: Applied Natural Language Processing Information Extraction and Recommender Systems for Video Games Nouns in Reviews

2. Putting Pieces Together Separated reviews into sentences Tagged NEs Identified adjectives of interest Want to put these together to parse sentences and identify dependency relations with relevant adjectives What nouns might be useful to watch for? Gameplay synonyms?

3. Finding Interesting Nouns Decided to sample nouns associated with adjectives on that list in review sentences Took main reviews from random 10% of games Tokenized the NE-tagged versions to be readable by Stanford parser Fed sentences containing adjectives on list to Stanford parser

4. Finding Interesting Nouns

5. Review sentences are long and most include an adjective of interest Stanford parser is not fast – Tests on entire main reviews took ~5 min/KB Switching from PTB-derived grammar to WSJ- derived grammar has improved speed somewhat But still needs another few days or more power to finish 10%

6. Finding Interesting Nouns For a less-detailed look, POS tagged a larger sample of reviews and extracted common nouns – Leaving out parsing step makes this much more feasible – Though less accurate

7. Finding Interesting Nouns gameAppears 4x more than anything else gameplay, story, character, mode, level, enemy, system, music, design Ubiquitous features series, player, screen, button, fun, play Game-related non-features quest, online, multiplayer, mission, weapon, team, camera Less ubiquitous features way, lot, bit, number, thing, somethingRandom

8. Finding Interesting Nouns There continue to be many potentially interesting nouns further down the list Not a lot of generic synonyms for “gameplay” or “experience” but many words related to some part of those