Run artificial language basic-level experiment

[hawkrobe]

• [x] Log drop/click data
• [x] Double-check conditions are being shuffled properly
• Currently, first trial always seems to be 'sub' type
• [x] Fix consent/instructions
• [x] Bump up bonus
• [x] Ensure morphemes of words are all different (to control for compositionality)
• [x] Revise stimuli to be more vision-y (Gabor patches & dot patterns)
• [x] change blue GO indicator to green
• [x] reduce to 2 syllable (to help working memory)
• [x] Create DV 'slide' (test about meaning at end)
• [ ] Show associative feedback more prominently
• e.g. fade out irrelevant labels, increase feedback length
• [x] only show full grid to speaker (listener only sees labels once dragged into grey box)
• [x] fix label locations for speaker
• [x] alternate player roles
• [x] snap labels to center of grey box
• [x] increase label grid to 4x4 instead of 3x3.
• [x] send data from post-test slide to server
• [x] handle exit_survey (i.e. display after post-test & hide on disconnect)