Participant Counter: Difference between revisions
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Now you would normally use the participant number to determine the condition: participant 0 get red, horizontal, | Now you would normally use the participant number to determine the condition: participant 0 get red, horizontal, | ||
participant 1 get green horizontal, participant | participant 1 get green horizontal, participant 2 get red, vertical, | ||
participant | participant 3 get green vertical and participant 4 gets red, horizontal again. (in real life the number of conditions can be much larger of course) | ||
This nice system is ruined by the fact that we have no consecutive participant numbers. Using the random participant | This nice system is ruined by the fact that we have no consecutive participant numbers. Using the random participant numbers from the panel system | ||
may work if the number of | may work if the number of participants is very large and the number of conditions is very small, but otherwise our counterbalancing is ruined. | ||
Use the participant counter to solve this. Just give the participant counter a nice unique name for | Use the participant counter to solve this. Just give the participant counter a nice unique name for your experiment and each time you call it, it will | ||
give you a new | give you a new counter value. It has some additional features as well. | ||
= just count = | = just count = | ||
curl 'https://www.socsci.ru.nl/wilberth/nocms/radcloud/participant_counter.php?experiment=1' | |||
{"experiment":"1","counter":"0","timeout":""} # first counter value | # {"experiment":"1","counter":"0","timeout":""} # first counter value | ||
curl 'https://www.socsci.ru.nl/wilberth/nocms/radcloud/participant_counter.php?experiment=1' | |||
{"experiment":"1","counter":"1","timeout":""} # a new counter value | # {"experiment":"1","counter":"1","timeout":""} # a new counter value | ||
curl 'https://www.socsci.ru.nl/wilberth/nocms/radcloud/participant_counter.php?experiment=1' | |||
{"experiment":"1","counter":"2","timeout":""} # and yet another counter value | # {"experiment":"1","counter":"2","timeout":""} # and yet another counter value | ||
= count with timeout = | = count with timeout = | ||
curl 'https://www.socsci.ru.nl/wilberth/nocms/radcloud/participant_counter.php?experiment=1&timeout=10' | |||
{"experiment":"1","counter":"3","timeout":"10"} # ppn is released after ten seconds | # {"experiment":"1","counter":"3","timeout":"10"} # ppn is released after ten seconds | ||
sleep 15 | |||
curl 'https://www.socsci.ru.nl/wilberth/nocms/radcloud/participant_counter.php?experiment=1&timeout=10' | |||
{"experiment":"1","counter":"3","timeout":"10"} # we get the same counter value again | # {"experiment":"1","counter":"3","timeout":"10"} # we get the same counter value again | ||
== finalizing counter at the end of an experiment == | == finalizing counter at the end of an experiment == | ||
=== experiment finished in time, finalizing | === experiment finished in time, finalizing successful === | ||
curl 'https://www.socsci.ru.nl/wilberth/nocms/radcloud/participant_counter.php?experiment=1&timeout=10' | |||
{"experiment":"1","counter":"3","timeout":"10"} | # {"experiment":"1","counter":"3","timeout":"10"} | ||
curl 'https://www.socsci.ru.nl/wilberth/nocms/radcloud/participant_counter.php?experiment=1&counter=3' | |||
{"experiment":"1","counter":"3","timeout":""} # | # {"experiment":"1","counter":"3","timeout":""} # counter value is finalized, no other participant will receive this value in the future | ||
=== experiment takes too long and finalizing fails === | === experiment takes too long and finalizing fails === | ||
curl 'https://www.socsci.ru.nl/wilberth/nocms/radcloud/participant_counter.php?experiment=1&timeout=10' # get counter value | |||
{"experiment":"1","counter":"3","timeout":"10"} | # {"experiment":"1","counter":"3","timeout":"10"} | ||
sleep 15 # wait too long | |||
curl 'https://www.socsci.ru.nl/wilberth/nocms/radcloud/participant_counter.php?experiment=1&counter=3' # attempt to finalize counter | curl 'https://www.socsci.ru.nl/wilberth/nocms/radcloud/participant_counter.php?experiment=1&counter=3' # attempt to finalize counter | ||
{"experiment":"1","counter":"","timeout":""} # attempt fails, your were late (counter is not returned) | # {"experiment":"1","counter":"","timeout":""} # attempt fails, your were late (counter is not returned) | ||
= Automatic forwarding to experiment = | = Automatic forwarding to experiment = | ||
You need not read the result as JSON. In order to get a 302 temprary redirect to https://www.nu.nl/?experiment=1&counter=8&timeout=10 use: | You need not read the result as JSON. In order to get a 302 temprary redirect to https://www.nu.nl/?experiment=1&counter=8&timeout=10 use: | ||
https://www.socsci.ru.nl/wilberth/nocms/radcloud/ | firefox https://www.socsci.ru.nl/wilberth/nocms/radcloud/participant_counter.php?experiment=1&timeout=10&url=http://www.nu.nl | ||
All the other features work in combination with the ''url'' parameter as well. | All the other features work in combination with the ''url'' parameter as well. | ||
= Adding a participant identifier from the panel system = | = Adding a participant identifier from the panel system = | ||
'' | You can add the participant value that you received from the panel system. This way, if the participant returns to your page (or for instances presses F5) he will receive the same counter value and hence the same version of the experiment. | ||
curl 'https://www.socsci.ru.nl/wilberth/nocms/radcloud/participant_counter.php?experiment=1&participant=john' | |||
# {"experiment":"1","counter":"0","timeout":"","participant:"john"} # first counter value | |||
curl 'https://www.socsci.ru.nl/wilberth/nocms/radcloud/participant_counter.php?experiment=1&participant=john' | |||
# {"experiment":"1","counter":"0","timeout":"","participant:"john"} # The same counter value that john received last time. | |||
If you combine a ''participant'' value with a ''timeout'', the ''timeout'' will be reset to the new value, giving the participant more time to complete the experiment. Setting timeout on a finalized experiment will not result in an error, but will not reset the ''timeout'' value. | |||
= Maximum counter value = | |||
''This feature has not yet been implemented'' | |||
= Set of counter values = | |||
''This feature has not yet been implemented'' | |||
= Random order of counter values = | |||
''This feature has not yet been implemented'' | |||