用PsychoPy做视觉搜索任务实验
2016-10-14 本文已影响2253人
ChZ_CC
不靠谱PsychoPy入门教程目录：
帮师妹做的程序，虽然最后没有采用。可能用这个做动画还是有点儿吃力，在我的电脑上可以妥妥的跑起来，放师妹的电脑上就各种卡 o(╯□╰)o
不管啦。实验要求是：
- 在屏幕上某个范围内搞出n个白色的小圆，其中四个是追踪目标。小圆出现的位置是随机的。
- 静止呈现一秒钟。4个追踪目标上有小红点儿做提示。
- 然后这些球就开始动了。运动方向是随机的，每隔一秒转换一次方向。
程序写完之后运行起来是这样的：
被试的任务就是盯着那几个追踪目标，然后在运动结束之后，选出四个目标来。选择部分就要用到一下鼠标。还有设置什么诱导刺激，就是在运动过程中，某个小圆会搞小动作，看被试能不能注意到。有兴趣的同学可以试试玩儿。
gif图的代码如下：
#!/usr/bin/env python
# -*- coding: utf-8 -*-
from psychopy import visual, core, event,gui
import random, math,time
win = visual.Window(fullscr = False, size = [900,700], color = [-1,-1,-1], units = 'pix')
#win = visual.Window(fullscr = True, size = [1366, 768], color = [-1,-1,-1], units = 'pix') #全屏模式
x,y = win.size
yuan0 = visual.Circle(win, radius=7, edges=60, size = [1,1], fillColor='white', name = 'target')
yuan1 = visual.Circle(win, radius=7, edges=60, size = [1,1], fillColor='white', name = 'target')
yuan2 = visual.Circle(win, radius=7, edges=60, size = [1,1], fillColor='white', name = 'target')
yuan3 = visual.Circle(win, radius=7, edges=60, size = [1,1], fillColor='white', name = 'target')
yuan4 = visual.Circle(win, radius=7, edges=60, size = [1,1], fillColor='white', name = 'nontarget')
yuan5 = visual.Circle(win, radius=7, edges=60, size = [1,1], fillColor='white', name = 'nontarget')
yuan6 = visual.Circle(win, radius=7, edges=60, size = [1,1], fillColor='white', name = 'nontarget')
yuan7 = visual.Circle(win, radius=7, edges=60, size = [1,1], fillColor='white', name = 'nontarget')
yuan8 = visual.Circle(win, radius=7, edges=60, size = [1,1], fillColor='white', name = 'nontarget')
yuan9 = visual.Circle(win, radius=7, edges=60, size = [1,1], fillColor='white', name = 'nontarget')
yuan10 = visual.Circle(win, radius=7, edges=60, size = [1,1], fillColor='white', name = 'nontarget')
yuan11 = visual.Circle(win, radius=7, edges=60, size = [1,1], fillColor='white', name = 'nontarget')
yuan12 = visual.Circle(win, radius=7, edges=60, size = [1,1], fillColor='white', name = 'nontarget')
yuan13 = visual.Circle(win, radius=7, edges=60, size = [1,1], fillColor='white', name = 'nontarget')
induce_point_non = visual.Circle(win, radius=4, edges=60, size = [1,1], fillColor='black', opacity = 0, name = 'induce_point_non')
induce_point = visual.Circle(win, radius=4, edges=60, size = [1,1], fillColor='black', opacity = 0, name = 'induce_point')
boundary = visual.ShapeStim(win, fillColor=[-0.3,-0.3,-0.3], opacity = 0.5,
vertices=[(y/3+15,y/3+15),(y/3+15,-(y/3+15)),(-(y/3+15),-(y/3+15)),(-(y/3+15),y/3+15)])
timer = core.Clock()
def item_select(num):
items = [eval('yuan'+str(i)) for i in range(num)]
x,y = win.size
start_pos = [(random.uniform(-(y/3-yuan0.radius*5),y/3-yuan0.radius*5),random.uniform(-(y/3-yuan0.radius*5),y/3-yuan0.radius*5)) for i in range(len(items))]
for i in range(len(items)):
items[i].pos = start_pos[i]
t=1
while t:
t = 1
for i in range(len(items)):
for j in range(i+1,len(items)):
x,y=items[i].pos
a,b=items[j].pos
if math.sqrt((x-a)**2+(y-b)**2)<=yuan0.radius*6:
items[j].pos = (random.uniform(-(y/3-yuan0.radius*5),y/3-yuan0.radius*5),random.uniform(-(y/3-yuan0.radius*5),y/3-yuan0.radius*5))
t += 1
if t == 1:
break
return [items, start_pos]
#-----静止呈现
def present(items,s):
while timer.getTime()<s:
boundary.draw()
for i in range(len(items)):
items[i].draw()
win.flip()
def static_present(items):
timer.reset()
present(items,1) #最初呈现时间，1s。
for i in range(4): #【追踪目标】四个。
items[i].fillColor = 'red'
present(items,2) #显示目标，2s。
for i in range(len(items)):
items[i].fillColor = 'white'
#-----运动
def movement(items,time):
event.clearEvents()
moveAngle = [random.uniform(0,2*math.pi) for i in range(len(items))]
x,y = win.size
timer.reset()
timer_2 = core.Clock()
timer_2.reset()
while timer.getTime()<time:
timeUse = timer_2.getTime()
timer_2.reset()
boundary.draw()
for i in range(len(items)):
a,b = items[i].pos
if not int(abs(a)) < (y/3+yuan0.radius) : #边缘碰撞
moveAngle[i]=2*math.pi-moveAngle[i]
if not int(abs(b)) < (y/3+yuan0.radius) :
moveAngle[i]=math.pi-moveAngle[i]
for j in range(i+1,len(items)): #小球碰撞
h,k= items[i].pos - items[j].pos
if math.sqrt(h**2+k**2)<=(yuan0.radius*4) : #如果相遇，交换运动方向。
moveAngle[i],moveAngle[j] = moveAngle[j],moveAngle[i]
items[i].pos+=[math.sin(moveAngle[i])*timeUse*100, math.cos(moveAngle[i])*timeUse*100] #运动速度
for i in range(len(items)):
induce_point.draw()
induce_point_non.draw()
items[i].draw()
win.flip()
items,start_pos=item_select(12)
static_present(items)
for j in range(6):
movement(items, 1) #每次1s
完整的程序可以在这儿下载：
链接：http://pan.baidu.com/s/1c2ICTBa 密码: rs74
有什么疑问或者建议可以评论给我哦。不保证能解决哦。
