Showing feedback on highest/lowest joystick.x score

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Showing feedback on highest/lowest joystick.x score

Showing feedback on highest/lowest joystick.x score

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knr	knr posted 7 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 4, Visits: 27	Hi, I have a study where a video plays and after every second a recording is made of the joystick.x position. This works fine, but now I'd like to add in at the end a readout to participants of their highest and lowest ratings. However, whenever I try to do this, it only seems to report whatever the last position of the joystick is. I'm sure that I'm missing something simple. So far the working part looks like: <trial 1sectrial> / inputdevice = joystick / timeout = 1000 / validresponse = (left, right, noresponse) / ontrialend = [expressions.rating] </trial> <expressions> / rating = joystick.x </expressions> <block videoblock> / trials = [1-96 = 1sectrial] / bgstim = (video) </block> I've tried various uses of expressions/values but not sure what I would need to add to get the max/min out of those 96 trials. Thanks in advance!!
	Reply Like 34
Dave	Dave posted 7 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 12K, Visits: 98K	+x knr - Friday, May 19, 2017 Hi, I have a study where a video plays and after every second a recording is made of the joystick.x position. This works fine, but now I'd like to add in at the end a readout to participants of their highest and lowest ratings. However, whenever I try to do this, it only seems to report whatever the last position of the joystick is. I'm sure that I'm missing something simple. So far the working part looks like: <trial 1sectrial> / inputdevice = joystick / timeout = 1000 / validresponse = (left, right, noresponse) / ontrialend = [expressions.rating] </trial> <expressions> / rating = joystick.x </expressions> <block videoblock> / trials = [1-96 = 1sectrial] / bgstim = (video) </block> I've tried various uses of expressions/values but not sure what I would need to add to get the max/min out of those 96 trials. Thanks in advance!! What you'll want to do is add the x position to a <list> at the end of each trial. I.e. at the end, the list will contain 96 items. You'll then have to sort that list to find the maximum value recorded, similar to what's done to find a median value here: https://www.millisecond.com/forums/Topic14637.aspx Under Inquisit 5 this would be easier: Here merely adding the observations to the <list> and then reading the list's maximum property would suffice: https://www.millisecond.com/forums/FindPost21609.aspx or https://www.millisecond.com/forums/FindPost20304.aspx (analogous example for the list's median property). Hope this helps.
	Reply Like 33
knr	knr posted 7 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 4, Visits: 27	+x Dave - Friday, May 19, 2017 +x knr - Friday, May 19, 2017 Hi, I have a study where a video plays and after every second a recording is made of the joystick.x position. This works fine, but now I'd like to add in at the end a readout to participants of their highest and lowest ratings. However, whenever I try to do this, it only seems to report whatever the last position of the joystick is. I'm sure that I'm missing something simple. So far the working part looks like: <trial 1sectrial> / inputdevice = joystick / timeout = 1000 / validresponse = (left, right, noresponse) / ontrialend = [expressions.rating] </trial> <expressions> / rating = joystick.x </expressions> <block videoblock> / trials = [1-96 = 1sectrial] / bgstim = (video) </block> I've tried various uses of expressions/values but not sure what I would need to add to get the max/min out of those 96 trials. Thanks in advance!! What you'll want to do is add the x position to a <list> at the end of each trial. I.e. at the end, the list will contain 96 items. You'll then have to sort that list to find the maximum value recorded, similar to what's done to find a median value here: https://www.millisecond.com/forums/Topic14637.aspx Under Inquisit 5 this would be easier: Here merely adding the observations to the <list> and then reading the list's maximum property would suffice: https://www.millisecond.com/forums/FindPost21609.aspx or https://www.millisecond.com/forums/FindPost20304.aspx (analogous example for the list's median property). Hope this helps. Ahhh thanks so much! I would never have gotten to this solution on my own! Working perfectly now!
	Reply Like 32