survey contains 56 columns - click on heading to sort:

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