# Response Box vs Target Box HELP! :)

**URL:** <https://discourse.psychopy.org/t/response-box-vs-target-box-help/46858>\
**Category:** Coding\
**Tags:** code\
**Created:** [March 23, 2026, 4:35pm UTC](https://discourse.psychopy.org/t/response-box-vs-target-box-help/46858 "2026-03-23T16:35:57Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![dindooku](https://avatars.discourse-cdn.com/v4/letter/d/7cd45c/32.png) [@dindooku](https://discourse.psychopy.org/u/dindooku)\
**Post date:** [March 23, 2026, 4:35pm UTC](https://discourse.psychopy.org/t/response-box-vs-target-box-help/46858/1 "2026-03-23T16:35:57Z")

</div>

Hi all,

I am creating an experiment that includes an ‘image’ witha target inside of it, and it is up to the participant to look at the image, identify the target, inidicate using the keyboard whether the target is present (Y = yes, N = no), then draw a box around the target to show where they think it is.

I seem to be having some isses with the coding. This is my current error code.

> ####### Running: /Users/amylou/Desktop/PsychoPy IIT/untitled\_lastrun.py ########  
> 5240.0064 INFO Loaded monitor calibration from [‘2025\_03\_10 15:05’]  
> 5240.0248 INFO Loaded monitor calibration from [‘2025\_03\_10 15:05’]  
> 2026-03-23 16:23:01.472 python[28448:4160181] ApplePersistenceIgnoreState: Existing state will not be touched. New state will be written to /var/folders/m9/h3\_x\_j9d1c55ly8f360sb9wh0000gn/T/org.opensciencetools.psychopy.savedState  
> 2026-03-23 16:23:04.587 python[28448:4160181] Warning: Expected min height of view: (\<NSPopoverTouchBarItemButton: 0x7f8b065f4970\>) to be less than or equal to 30 but got a height of 32.000000. This error will be logged once per view in violation.  
> 2026-03-23 16:23:04.587 python[28448:4160181] Warning: Expected min height of view: (\<NSButton: 0x7f8b063e6bd0\>) to be less than or equal to 30 but got a height of 32.000000. This error will be logged once per view in violation.  
> 2026-03-23 16:23:04.588 python[28448:4160181] Warning: Expected min height of view: (\<NSPopoverTouchBarItemButton: 0x7f8b0618f340\>) to be less than or equal to 30 but got a height of 32.000000. This error will be logged once per view in violation.  
> 2026-03-23 16:23:04.589 python[28448:4160181] Warning: Expected min height of view: (\<NSPopoverTouchBarItemButton: 0x7f8b12307080\>) to be less than or equal to 30 but got a height of 32.000000. This error will be logged once per view in violation.  
> 8.3921 WARNING Couldn’t measure a consistent frame rate!  
> Traceback (most recent call last):
> 
> - Is your graphics card set to sync to vertical blank?
> - Are you running other processes on your computer?
> 
> 0.0380 WARNING t of last frame was 20.93ms (=1/47)  
> 1.5097 WARNING t of last frame was 200.33ms (=1/4)  
> 2.7496 WARNING Stopping key buffers but this could be dangerous ifother keyboards rely on the same.  
> 2.7497 WARNING Stopping key buffers but this could be dangerous ifother keyboards rely on the same.  
> 2.7498 WARNING Stopping key buffers but this could be dangerous ifother keyboards rely on the same.  
> File “/Users/amylou/Desktop/PsychoPy IIT/untitled\_lastrun.py”, line 1484, in  
> run(  
> File “/Users/amylou/Desktop/PsychoPy IIT/untitled\_lastrun.py”, line 966, in run  
> respBox.opacity = 0  
> NameError: name ‘respBox’ is not defined  
> ################ Experiment ended with exit code 1 [pid:28448] #################

I will also include the code for the target and response boxes too

**Begin Experiment**

> # === TRUE TARGET BOX ===
> 
> target\_x = 0.120  
> target\_y = 0.345  
> target\_w = 0.402  
> target\_h = 0.454
> 
> # Only require box drawing if participant said “yes”
> 
> needBox = (correctAns.keys == ‘y’)
> 
> # Track drag state
> 
> dragging = False  
> boxFinished = False  
> startX, startY = None, None  
> endX, endY = None, None
> 
> # Default drawn box values
> 
> drawn\_x = None  
> drawn\_y = None  
> drawn\_w = None  
> drawn\_h = None
> 
> # Default scoring values
> 
> localisationCorrect = None  
> overlapArea = 0  
> overlapPropTarget = 0
> 
> # Hide the response box at first
> 
> respBox.opacity = 0  
> respBox.size = (0.001, 0.001)  
> respBox.pos = (0, 0)
> 
> # If the participant said “no”, skip this routine immediately
> 
> if not needBox:  
> continueRoutine = False

> **EACH FRAME**
> 
> # Keep debug target box aligned (only matters if you made it visible)
> 
> targetBox.pos = (target\_x, target\_y)  
> targetBox.size = (target\_w, target\_h)
> 
> # Current mouse position and buttons
> 
> mousePos = boxMouse.getPos()  
> buttons = boxMouse.getPressed()
> 
> # Start drawing when left mouse button is first pressed
> 
> if needBox and buttons[0] and not dragging and not boxFinished:  
> dragging = True  
> startX, startY = mousePos
> 
> # While dragging, update the visible response rectangle
> 
> if dragging and buttons[0]:  
> currentX, currentY = mousePos
> 
> ```auto
> drawn_x = (startX + currentX) / 2.0
> drawn_y = (startY + currentY) / 2.0
> drawn_w = abs(currentX - startX)
> drawn_h = abs(currentY - startY)
> 
> respBox.pos = (drawn_x, drawn_y)
> respBox.size = (max(drawn_w, 0.001), max(drawn_h, 0.001))
> respBox.opacity = 1
> 
> ```
> 
> # When mouse is released, finalise box and score it
> 
> if dragging and not buttons[0] and not boxFinished:  
> dragging = False  
> boxFinished = True
> 
> ```auto
> endX, endY = mousePos
> 
> drawn_x = (startX + endX) / 2.0
> drawn_y = (startY + endY) / 2.0
> drawn_w = abs(endX - startX)
> drawn_h = abs(endY - startY)
> 
> # Prevent zero-size boxes causing odd scoring
> drawn_w = max(drawn_w, 0.001)
> drawn_h = max(drawn_h, 0.001)
> 
> # Update visible response box one last time
> respBox.pos = (drawn_x, drawn_y)
> respBox.size = (drawn_w, drawn_h)
> respBox.opacity = 1
> 
> # Edge coordinates of participant's drawn box
> drawn_left = drawn_x - drawn_w / 2.0
> drawn_right = drawn_x + drawn_w / 2.0
> drawn_bottom = drawn_y - drawn_h / 2.0
> drawn_top = drawn_y + drawn_h / 2.0
> 
> # Edge coordinates of true target box
> target_left = target_x - target_w / 2.0
> target_right = target_x + target_w / 2.0
> target_bottom = target_y - target_h / 2.0
> target_top = target_y + target_h / 2.0
> 
> # Compute overlap rectangle
> overlap_w = max(0, min(drawn_right, target_right) - max(drawn_left, target_left))
> overlap_h = max(0, min(drawn_top, target_top) - max(drawn_bottom, target_bottom))
> overlapArea = overlap_w * overlap_h
> 
> # Areas
> targetArea = target_w * target_h
> drawnArea = drawn_w * drawn_h
> 
> # Proportion of the TRUE target covered by participant box
> if targetArea > 0:
> overlapPropTarget = overlapArea / targetArea
> else:
> overlapPropTarget = 0
> 
> # Proportion of participant's box that overlaps the target
> if drawnArea > 0:
> overlapPropDrawn = overlapArea / drawnArea
> else:
> overlapPropDrawn = 0
> 
> # Scoring rule:
> # correct if participant box covers at least 10% of true target area
> localisationCorrect = int(overlapPropTarget >= 0.10)
> 
> # End routine once the box is completed
> continueRoutine = False
> 
> ```

> **END ROUTINE**
> 
> # Save box data
> 
> thisExp.addData(‘needBox’, needBox)  
> thisExp.addData(‘drawn\_x’, drawn\_x)  
> thisExp.addData(‘drawn\_y’, drawn\_y)  
> thisExp.addData(‘drawn\_w’, drawn\_w)  
> thisExp.addData(‘drawn\_h’, drawn\_h)  
> thisExp.addData(‘overlapArea’, overlapArea)  
> thisExp.addData(‘overlapPropTarget’, overlapPropTarget)  
> thisExp.addData(‘localisationCorrect’, localisationCorrect)
> 
> # Detection score
> 
> if decisionResp.keys is not None:  
> detectionCorrect = int(decisionResp.keys == correctAns)  
> else:  
> detectionCorrect = 0
> 
> thisExp.addData(‘detectionCorrect’, detectionCorrect)
> 
> # Overall combined score:
> 
> # - absent trials are correct if N was pressed correctly
> 
> # - present trials are fully correct only if Y was correct and localisation is correct
> 
> if correctAns == ‘n’:  
> overallCorrect = detectionCorrect  
> elif correctAns == ‘y’:  
> overallCorrect = int((decisionResp.keys == ‘y’) and (localisationCorrect == 1))  
> else:  
> overallCorrect = None
> 
> thisExp.addData(‘overallCorrect’, overallCorrect)

Any help on how to solve this, or any advice would be greatly received.

Many thanks,

Lou!

---

<div class="post-metadata">

**Author:** ![wakecarter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/wakecarter/32/5753_2.png) [@wakecarter](https://discourse.psychopy.org/u/wakecarter)\
**Post date:** [March 23, 2026, 4:51pm UTC](https://discourse.psychopy.org/t/response-box-vs-target-box-help/46858/2 "2026-03-23T16:51:04Z")

</div>

> [@dindooku](#):
>
> respBox.opacity = 0

I assume that this is in a code component in the same routine as respBox. You could just set the opacity to 0 in the component. However, the key error here is that the code component should be above respBox.

> [@Wakefield's Daily Tips](https://discourse.psychopy.org/t/wakefields-daily-tips/43371/9):
>
> Code components go at the top When you add components to a routine they will, by default, appear in the order you create them. This is also, however, the order in which they get processed. I recommend that when you create a code component you move it to the top of the routine unless you have a specific reason why it should be lower down. The main reason for this is that it means the code in the Begin Routine tab is processed before any “set every repeat” parameters are set in other components. …

Also, you seem to have continueRoutine = False in Begin Experiment, which doesn’t make sense. You could set the Routine Settins to skip if “not needBox”.