PsychoPy- event.getKeys() 正在移动到下一个刺激，而无需运行下一个刺激决策所需的代码

问题描述

出于某种原因，当 event.getKeys() 在下面的第 5 行中运行时，它会立即转到屏幕上显示的下一个刺激，而无需使用下面的所有代码来帮助决定接下来显示哪个刺激。 但是，发生的事情是代码正在运行，但在它呈现下一个刺激之后。所以基本上这是一个逐个错误，因为每个“下一个刺激”都使用来自上一个刺激选择的数据。 我试图将所有这些都包装在一个 while 循环中，但它仍然不起作用。 所以，假设有人按“2”让一张快乐的脸出现。然后下一次审判他们按“7”以获得一张悲伤的脸。当他们按下那个 7 时，它会显示一张笑脸，因为这是之前的输入键 (2) 选择。然后，无论他们接下来选择什么，总会有一张悲伤的脸，因为之前按了 7。在继续下一个呈现的刺激之前，所有代码都没有运行。 感谢您的帮助。

# random numbers for choosing a picture and Happy/Sad
rand = random.randint(1,140)

# acquire response key for bias
key = str(event.getKeys())

# check is bias direction equals key selection
if bias == key: 
    print ("choosing H or S")
    # get happy/sad for bias
    biasPercent = random.random() # check for 90/10%
    if biasPercent <= 0.90:
        biasEmotion = "S"
    if biasPercent > 0.90:
        biasEmotion = "H"
    print ("..................biasEmotion = " + biasEmotion)

if bias != key: 
    print ("choosing H or S")
    
    # get happy/sad for bias
    biasPercent = random.random() # check for 90/10%
    if biasPercent <= 0.90:
        biasEmotion = "H"
        happyFaceCount = happyFaceCount + 1
    if biasPercent > 0.90:
        biasEmotion = "S"
        sadFaceCount = sadFaceCount + 1
    print ("..................biasEmotion = " + biasEmotion)
    
comparison = False
iteration = 1
# chooses a random face from excel column A
while (imgName in listOfFacesHappy) or (imgName in listOfFacesSad) or comparison:
    print (str(iteration) + "  iteration")
    iteration = iteration + 1
    rand = random.randint(1,140)
    face = insheet.row_values(rand)
    imgName = face[0] # Column A (index 0) from excel
    sexIndex = imgName[1] # second char in name of file
    emotionIndex = imgName[4] # fifth char in name of file
    if (biasEmotion != emotionIndex):
        print ("emotions not equal")
        comparison = True
    else:
        print ("..............found emotion")
        comparison = False
      
if emotionIndex == "H":
    listOfFacesHappy.append(imgName)
    happyFaceCount = happyFaceCount + 1
if emotionIndex == "S":
    listOfFacesSad.append(imgName)
    sadFaceCount = sadFaceCount + 1
#print ("face list = " + str(listOfFaces))

# names currently hardcoded and not taken from excel or text file yet
if sexIndex == "F":
    nameR = random.choice(fnames)
    nameL = random.choice(fnames)
    while nameL == nameR:   #make sure two names are different
        nameR = random.choice(fnames)
if sexIndex == "M":
    nameR = random.choice(mnames)
    nameL = random.choice(mnames)
    while nameL == nameR:   #make sure two names are different
        nameR = random.choice(mnames)

解决方法

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