URL of experiment: Pavlovia
Description of the experiment:
Hi everyone,
Any help would be really appreciated; I’m really lost on this one!
In my experiment, the participants see two present boxes. There’s a wait period and then a response cue (’?’) is shown. Participants then have to choose one of the two boxes. After their choice is made, there’s a wait period. The correct box that they should have chosen is then shown onscreen and a star is animated to fly from the centre of the screen upwards. Participants have 4s to respond from the response cue (’?) onset. If they don’t respond, a warning message is shown, ‘Please choose a present box’.
The issues:
This works locally. However, online I get the following issues:
- On the first trial, the correct box that they should have chosen isn’t visible.
- On subsequent trials, when the correct box is visible, the correct box from the last trial is shown briefly. As if the box is updating in real-time. The same is true for the number value under the box.
- The star animation appears to be shown briefly in it’s finished position before restarting its animated flight up the screen
- The warning message is shown after each trial. Even when a response is made.
This is a video of the experiment behaving as intended locally:
This is a video of the experiment behaving inappropriately online:
I slowed down the online video and saw that what was happening was the correct box and final star position from the last trial was briefly being shown on each trial before it resets/updates to the correct box for the current trial.
See the slowed video here:
And here is a screenshot of the moment that the star/present box from the last trial briefly flash onscreen:
The code:
This is the code from the main code component in the practice trials. The main trials code is largely the same.
This is a more detailed look at the Each Frame tab on the JS side:
let buttons = mouse.getPressed(); // read mouse state
const xys = mouse.getPos(); // get mouse coordinates
mouse.x.push(xys[0]); // add mouse coordinates to x/y list, in principle for data storage, but not implemented right now
mouse.y.push(xys[1]);
mouse.leftButton.push(buttons[0]); // store buttons in button list, likewise for storage
mouse.midButton.push(buttons[1]);
mouse.rightButton.push(buttons[2]);
if ((PRACTresponded === 0)) {
if (!buttons.every( (e,i,) => (e == prevButtonState[i]) )) { // button state changed?
prevButtonState = buttons;
if ((((PRACTRespCue.status === PsychoJS.Status.STARTED) && (buttons.reduce( (e, acc) => (e+acc) ) > 0)) && (PRACTblue.contains(mouse)))) {
PRACTresponded = 1;
if ((corrAns === "blue")) {
PRACToutcome = 1;
PRACToutcomeMsg = "Correct! The star was in the blue box!";
PRACTcorrectImage = "images/blue.png";
if ((mouse.getPos()[0] < 0)) {
PRACTcorrectRew = PRACTreward1;
PRACTtotalScore = (PRACTtotalScore + PRACTreward1);
} else {
if ((mouse.getPos()[0] > 0)) {
PRACTcorrectRew = PRACTreward2;
PRACTtotalScore = (PRACTtotalScore + PRACTreward2);
}
}
} else {
PRACToutcome = 0;
PRACToutcomeMsg = "Bad luck! The star was in the red box.";
PRACTcorrectImage = "images/red.png";
if ((mouse.getPos()[0] < 0)) {
PRACTcorrectRew = PRACTreward2;
} else {
if ((mouse.getPos()[0] > 0)) {
PRACTcorrectRew = PRACTreward1;
}
}
}
PRACTMsg = ("Total score = " + PRACTtotalScore.toString());
} else {
if ((((PRACTRespCue.status === PsychoJS.Status.STARTED) && (buttons.reduce( (e, acc) => (e+acc) ) > 0)) && (PRACTred.contains(mouse)))) {
PRACTresponded = 1;
if ((corrAns === "red")) {
PRACToutcome = 1;
PRACToutcomeMsg = "Correct! The star was in the red box!";
PRACTcorrectImage = "images/red.png";
if ((mouse.getPos()[0] < 0)) {
PRACTcorrectRew = PRACTreward1;
PRACTtotalScore = (PRACTtotalScore + PRACTreward1);
} else {
if ((mouse.getPos()[0] > 0)) {
PRACTcorrectRew = PRACTreward2;
PRACTtotalScore = (PRACTtotalScore + PRACTreward2);
}
}
} else {
PRACToutcome = 0;
PRACTcorrectImage = "images/blue.png";
PRACToutcomeMsg = "Bad luck! The star was in the blue box.";
if ((mouse.getPos()[0] < 0)) {
PRACTcorrectRew = PRACTreward2;
} else {
if ((mouse.getPos()[0] > 0)) {
PRACTcorrectRew = PRACTreward1;
}
}
}
PRACTMsg = ("Total score = " + PRACTtotalScore.toString());
}
}
}
}
if ((PRACTcross3.status === PsychoJS.Status.FINISHED)) {
continueRoutine = false;
}
if ((PRACTcorrectImg.status === PsychoJS.Status.STARTED)) {
if ((PRACTstarPos[1] < 0.3)) {
PRACTstarPos[1] = (PRACTstarPos[1] + 0.05);
}
}
if ((PRACTrespCueTime === 0)) {
if ((PRACTRespCue.status === PsychoJS.Status.STARTED)) {
PRACTrespCueTime = 1;
PRACTcueStart = PRACTtimer.getTime();
}
}
if ((PRACTrespCueTime === 1)) {
if (((PRACTresponded === 0) && ((PRACTtimer.getTime() - PRACTcueStart) > 3.99))) {
PRACTwarningGo = 1;
continueRoutine = false;
}
}
And on the python side:
if PRACTresponded==0:
if PRACTRespCue.status==STARTED and mouse.getPressed()[0]==1 and mouse.isPressedIn(PRACTblue): #if blue clicked
PRACTresponded=1
if corrAns=='blue': #and blue correct
PRACToutcome = 1
PRACToutcomeMsg = 'Correct! The star was in the blue box!'
PRACTcorrectImage = 'images/blue.png'
if mouse.getPos()[0] <0: #if clicked left
PRACTcorrectRew = PRACTreward1 #correct reward is on left
PRACTtotalScore = PRACTtotalScore + PRACTreward1
elif mouse.getPos()[0] >0: #if clicked right
PRACTcorrectRew = PRACTreward2 #correct reward is on right
PRACTtotalScore = PRACTtotalScore + PRACTreward2
else:
PRACToutcome = 0
PRACToutcomeMsg = 'Bad luck! The star was in the red box.'
PRACTcorrectImage = 'images/red.png'
if mouse.getPos()[0] <0: #if clicked left
PRACTcorrectRew = PRACTreward2 #correct reward is on right
elif mouse.getPos()[0] >0: #if clicked right
PRACTcorrectRew = PRACTreward1 #correct reward is on left
PRACTMsg = 'Total score = ' + str(PRACTtotalScore)
elif PRACTRespCue.status==STARTED and mouse.getPressed()[0]==1 and mouse.isPressedIn(PRACTred): #if red clicked
PRACTresponded=1
if corrAns=='red': #and red correct
PRACToutcome = 1
PRACToutcomeMsg = 'Correct! The star was in the red box!'
PRACTcorrectImage = 'images/red.png'
if mouse.getPos()[0] <0: #if clicked left
PRACTcorrectRew = PRACTreward1 #correct reward is on left
PRACTtotalScore = PRACTtotalScore + PRACTreward1
elif mouse.getPos()[0] >0: #if clicked right
PRACTcorrectRew = PRACTreward2 #correct reward is on right
PRACTtotalScore = PRACTtotalScore + PRACTreward2
else:
PRACToutcome = 0
PRACTcorrectImage = 'images/blue.png'
PRACToutcomeMsg = 'Bad luck! The star was in the blue box.'
if mouse.getPos()[0] <0: #if clicked left
PRACTcorrectRew = PRACTreward2 #correct reward is on right
elif mouse.getPos()[0] >0: #if clicked right
PRACTcorrectRew = PRACTreward1 #correct reward is on left
PRACTMsg = 'Total score = ' + str(PRACTtotalScore)
if PRACTcross3.status==FINISHED:
continueRoutine = False
if PRACTcorrectImg.status==STARTED:
if PRACTstarPos[1]<0.3:
PRACTstarPos[1] = PRACTstarPos[1]+0.05
if PRACTrespCueTime==0:
if PRACTRespCue.status==STARTED:
PRACTrespCueTime=1
PRACTcueStart = PRACTtimer.getTime()
if PRACTrespCueTime==1:
if PRACTresponded==0 and PRACTtimer.getTime()-PRACTcueStart >3.99:
PRACTwarningGo = 1
continueRoutine = False
Any help at all would be amazing! Thank you!
Hannah
