survey contains 56 columns - click on heading to sort:

Table	Column	Type	Size	Nulls	Auto	Default	Children	Parents	Comments
sessions	age	int	10			0			User age
sessions	agent	text	65535	√		null			Client agent
image_attributes	aid	int	10			0		attributes.id FK_image_attributes_aid	Attribute id
questions	aid	int	10			0		attributes.id FK_questions_aid	Attribute id
sessions	bkgrnd	int	10			0			User background in image processing
comparisons	cid	int	10			0	options.cid FK_options_cid		Comparison id (within this session, 0 based)
options	cid	int	10			0		comparisons.cid FK_options_cid	Comparison id
sessions	comment	text	65535	√		null			Any additional comment about this session
questions	condition	int	10	√		0			Ask question only if: 0=always, 1=only if size is reduced
comparisons	ctime	double	22	√		null			The time it took the user to choose his preferred result (might be NULL in earlier versions)
comparisons	did	int	10			0		results.did FK_comparisons_res2	Dataset id
experiments_judges	did	int	10			0		datasets.id FK_experiments_judges_did	Dataset id
results	did	int	10			0	comparisons.did FK_comparisons_res2	datasets.id FK_results_did	Dataset id
datasets	dim	int	10						Resizing dimension (MATLAB notation: 1=height, 2=width)
attributes	enabled	bit	0			1			Do we use this attribute in practice?
sessions	ended	datetime	19	√		null			The time this session ended (NULL for partially completed session)
experiments_judges	expid	int	10			0			Experiment id
sessions	expid	int	10	√		null			Experiment id (if applicable)
sessions	exptype	int	10			0			Experiment type (0=reference, 1=blind)
results	filename	varchar	64						Result file name
datasets	filter	text	65535	√		null			Results to filter (currently given as comma separated operator names)
sessions	gender	int	10			0			User gender
images	height	int	10						Image height
sessions	host	text	65535	√		null			Client host (by reverse DNS lookup)
attributes	id	int	10			0	image_attributes.aid FK_image_attributes_aid questions.aid FK_questions_aid		Unique attribute identifier
datasets	id	int	10		√		experiments_judges.did FK_experiments_judges_did results.did FK_results_did		Unique dataset identifier
images	id	int	10		√		datasets.imid FK_datasets_imid image_attributes.imid FK_image_attributes_imid		Unique image identifier
operators	id	int	10			0			Unique operator identifier
questions	id	int	10		√		options.qid FK_options_qid		Unique question identifier
results	id	int	10			0	comparisons.res1 FK_comparisons_res1 comparisons.res2 FK_comparisons_res2		Result id (within the dataset)
sessions	id	int	10		√		comparisons.sid FK_comparisons_sid		Unique session identifier
datasets	imid	int	10			0		images.id FK_datasets_imid	Image id
image_attributes	imid	int	10			0		images.id FK_image_attributes_imid	Image id
sessions	ip	varchar	32	√		null			Client ip
experiments_judges	judgeid	int	10			0			Judge id (a row in the design)
datasets	mode	int	10			0			Survey mode (0=random, 1=design)
sessions	mode	int	10	√		null			Survey mode (0=random, 1=experiment)
attributes	name	varchar	255						Attribute name
images	name	varchar	64						Image name
operators	name	varchar	16						Operator name
results	opid	int	10			0			Operator id
comparisons	options	varchar	128	√		null			The selected options in case the extra question was given (NULL o/w)
options	qid	int	10			0		questions.id FK_options_qid	Question id
comparisons	qtime	double	22	√		null			The time it took the user to select his options
questions	question	text	65535						Question string
datasets	r	double	22			0			Resize ratio
comparisons	res1	int	10			0		results.id FK_comparisons_res1	Left result id
comparisons	res2	int	10			0		results.id FK_comparisons_res2	Right result id
comparisons	selected	int	10			0			Selected result id
comparisons	sid	int	10			0	options.sid FK_options_cid	sessions.id FK_comparisons_sid	Session id
options	sid	int	10			0		comparisons.sid FK_options_cid	Session id
sessions	started	datetime	19			0000-00-00 00:00:00			The time this session started
sessions	user	int	10			0			User type (0=normal, 1=mturk)
sessions	uuid	varchar	128						Session uuid generated by PHP
sessions	version	double	22			0			Survey version
images	width	int	10						Image width