我制定了自己的评分标准，这是一个从0到28:18的时间表。它根据人们每次尝试按下“ t”或“ b”键的速度而变化。屏幕上显示的内容如下所示：
我希望每次试用都将顶部时间重置为14:09。每次试用后为0.5秒的试用间隔，在此间隔期间屏幕上显示“ +”。我遇到的问题是，如果您在ITI期间按“ t”或“ b”，则下一次审判不会在14:09开始。取而代之的是，它将按“ t”或“ b”按更改时间轴的方向移动。这是我目前尝试纠正的代码：
prevPos = 0
trialNum=0
b_list=[]
t_list=[]
key=[]
# loop through pictures
for eachPic in catPictures:
b_list=[]
t_list=[]
timer = core.CountdownTimer(TrialDuration)
while timer.getTime() > 0:
for key in event.getKeys():
if key in ['escape']:
core.quit() # quit if they press escape
if key in ['b']:
# add keypress to list for each keypress. then move cursor proportionally to length of this list
b_list.append(key)
prevPos+=len(b_list)
if key in ['t']:
t_list.append(key)
prevPos-=len(t_list)
# set upper and lower limits to where cursor can go (which will later be halved to restrict range of cursor on the screen)
if prevPos <= -849:
prevPos = -849
elif prevPos >=849:
prevPos = 849
# make absolute position so pos_absolute becomes a range from 0 to 300 (based on 28:18 min movie)
pos_absolute = prevPos + 849
# need to have range of 1698 (# of seconds in 28:18)
# need to have range of 1698 (# of seconds in 28:18)
# current range is 0 to 849 (which is 50% of 1698)
seconds = pos_absolute
Image2 = visual.ImageStim(window)
#curbImage2.setSize = ((0.5,0.5), units = 'norm')
# make a little higher than the absolute middle
Image2.setPos([0,100])
# use each image (i in curbImages)
Image2.setImage(catPictures[trialNum])
# define cursor that moves along timeline
cursorImage = visual.ImageStim(window)
cursorImage.setImage(directoryStim+'cursor.png')
# make cursor move by however big prevPos is
cursorImage.setPos([int(prevPos)*.5,int(400)])
# make the line
timeline = visual.SimpleImageStim(win=window, image=directoryStim+'line.png', units='pix', pos=[0, 400])
event.clearEvents() # get rid of other, unprocessed events
# print min and max values next to timeline
min = visual.TextStim(window, '0:00', color='Black', pos=[-500, 400])
max = visual.TextStim(window, '28:18', color='Black', pos=[500, 400])
# print constantly updating time value
timeText = visual.TextStim(window,'%d:%02d' % (seconds/60, seconds % 60),color='Black',wrapWidth=1080,font='Verdana', pos=[0,465], height=50)
## now put everything on the screen
Image2.draw(window)
min.draw(window)
max.draw(window)
timeText.draw(window)
timeline.draw(window)
cursorImage.draw(window)
## flip so it actually appears
window.flip()
ITI = visual.TextStim(window, '+', pos=[0,0], height=50, color='Black')
ITI.draw(window)
window.flip()
core.wait(.5,.5)
trialNum+=1
prevPos = 0
b_list =[]
t_list=[]
key=[]
即使人们在试验结束时或在两次试验间隔期间按“ t”或“ b”，如何在每次试验开始时将时间轴重置为14:09（又名
prevPos = 0）？ 最佳答案
在内部for循环下缩进内容。
将event.clearEvents()移到while循环之前
或core.wait之后。那是您开始聆听新音乐的地方
按键。等待期间的按键将返回到
下一个周期的下一个呼叫event.getKeys()
while循环。这就是为什么它会立即移动光标。没有啦
将event.clearEvents()放在哪里的真正原因
因为您只监听while循环中的事件。这就是为什么我
建议您移动它，而不要插入新的。
发起心理刺激非常耗费资源
有时可能需要几百毫秒。没有啦
创建几个新的ImageStims和TextStims的原因
每次审判。pos_absolute和seconds是多余的。您只能使用seconds。
样式：现在可以对所有其他属性执行stim.setPos(x)而不是stim.pos = x了。从现在开始，这是设置激励属性的首选方式（更干净的代码，允许对属性进行更多操作）。
这是经过上述更改的清理代码：
# Stimuli
Image2 = visual.ImageStim(window)
cursorImage = visual.ImageStim(window)
min = visual.TextStim(window, '0:00', color='Black', pos=[-500, 400])
max = visual.TextStim(window, '28:18', color='Black', pos=[500, 400])
timeText = visual.TextStim(window,color='Black',wrapWidth=1080,font='Verdana', pos=[0,465], height=50)
ITI = visual.TextStim(window, '+', pos=[0,0], height=50, color='Black')
timeline = visual.SimpleImageStim(win=window, image=directoryStim+'line.png', units='pix', pos=[0, 400])
timer = core.CountdownTimer(TrialDuration)
# loop through pictures
trialNum=0
for eachPic in catPictures:
prevPos = 0
key=[]
b_list=[]
t_list=[]
timer.reset()
event.clearEvents() # get rid of other, unprocessed events
while timer.getTime() > 0:
for key in event.getKeys():
if key in ['escape']:
core.quit() # quit if they press escape
if key in ['b']:
# add keypress to list for each keypress. then move cursor proportionally to length of this list
b_list.append(key)
prevPos+=len(b_list)
if key in ['t']:
t_list.append(key)
prevPos-=len(t_list)
# set upper and lower limits to where cursor can go (which will later be halved to restrict range of cursor on the screen)
if prevPos <= -849:
prevPos = -849
elif prevPos >=849:
prevPos = 849
# make absolute position so pos_absolute becomes a range from 0 to 300 (based on 28:18 min movie)
# need to have range of 1698 (# of seconds in 28:18)
# need to have range of 1698 (# of seconds in 28:18)
# current range is 0 to 849 (which is 50% of 1698)
seconds = prevPos + 849
#curbImage2.size = ((0.5,0.5), units = 'norm')
# make a little higher than the absolute middle
Image2.pos = [0,100]
# use each image (i in curbImages)
Image2.image = catPictures[trialNum]
# define cursor that moves along timeline
cursorImage.image = directoryStim+'cursor.png'
# make cursor move by however big prevPos is
cursorImage.pos = [int(prevPos)*.5,int(400)]
timeText.text = '%d:%02d' % (seconds/60, seconds % 60))
## now put everything on the screen
Image2.draw(window)
min.draw(window)
max.draw(window)
timeText.draw(window)
timeline.draw(window)
cursorImage.draw(window)
## flip so it actually appears
window.flip()
ITI.draw(window)
window.flip()
core.wait(.5,.5)
trialNum+=1
请注意，我还删除了
b_list，key等的一些看似不必要的重置。关于python - 每个试验的心理复位变量，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/32317483/