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  DirectRT-心理学实验软件

您是否有测量平均反应时间(RTs)小于1000ms的任务?您是否有刺激呈现和展示时间是以毫秒而不是秒为单位的任务?您是否适应”试验块”的概念?如果是,那么您来到了正确的地方- DirectRT可以大大”简化”您的生活。

强大且容易使用

通过DirectRT,您可以快速且方便的创建需要精确计时的反应时间任务。您将能够轻松地获得来自键盘,鼠标,游戏杆,麦克风和外部硬件精确的高速响应输入。以严格的精度呈现声音,视频,图像和文本。您会对DirectRT将这些变得如此简单而感到惊讶。

Windows可以适应精确

Windows历来在精确控制事件时间上是一个比较混乱的环境。然而Microsoft’s DirectX的发展已经在心理学研究方面改变了这一状况。基于DirectX的程序现在能够以毫秒级操纵图形和声音以及监控输入活动。擦去您旧示波器上的灰层,您亲眼验证下!irectRT 是 100% 的DirectX程序.

You’ll never go back

DirectRT附带详尽的在线帮助文件,一份浅显易懂的100页的手册以及超过40个示例的在线指南,它图形化的呈现了简单和高级的技术。使用Microsoft Excel作为编辑器,您能够很快的创建,复制,粘贴和修改实验。尽管我们现在提供了毫秒级精确的键盘和按键盒,DirectRT同样可以很好的处理大部分第三方外部硬件。甚至是一个标准的USB键盘,串口鼠标,控制杆,或声卡麦克风,错误是非常低的。底线是DirectRT将有助于减少与大多数硬件相关的计时错误。

一般特征和反应时间

  • 计时精确到1毫秒
  • 反应时间和屏幕显示同步,因此计时总是在屏幕第一次开始绘制开始(排除10-17毫秒的随机误差)
  • 配合Windows一起工作,在计时发生时终止所有其他系统事件。其他一切暂时搁置,当在每次试验的关键时间间隔时,可能的最高进程优先级会被赋予DirectRT.
  • 使用Microsoft’s DirectX来获得从键盘,鼠标,操纵杆和声卡输入事件的可能最快访问。
  • 随意定义最小和最大响应时间和为每次触发传递自定义消息屏幕。
  • 在一次试验中搜集多个响应时间
  • 除了搜集按键压下时间,还搜集按键释放响应时间。
  • 为任意响应定义有效的按键
  • 为任意响应定义”正确的”按键
  • 可选的请求一个正确的响应(查看IAT示例)

输入选项

  • 单次键压或按钮响应的键盘,鼠标和操纵杆输入
  • 短开放式(填充)响应
  • 通过连接到您声卡的麦克风的声音响应
  • 可选的保存到声音响应为wav文件到您的硬盘
  • 连续的操纵杆移动
  • TTL信号能够从一个定义的端口被读取,从外部设备来搜集数据

刺激呈现

  • 根据您的需要为任意给定的实验创建任意不同的显示
  • 播放声音文件
  • 能够处理多个同时的和/或顺序的声音文件,通过左/右panning和频率(Hz).方便的和可视化刺激同步。
  • 发送精确的同步TTL信号来和外部设备通讯(例如,其他的计算机控制生理设备)
  • Present subject's own responses to open ended questions as stimuli in the same session.
  • 方便的创建格式化文本的全屏幕说明
  • 通过字体和显示颜色的选择来创建多种样式设计
  • 呈现全彩色图形,可以是全屏幕大小和640x480 到 1024x768的任意分辨率
  • Superimpose custom graphics you make (e.g., special rating scales) over any other image or text. Great for pretesting and rating visual stimuli.
  • 从Microsoft PowerPoint和其他演示软件中捕获屏幕,并把他们在您的试验中呈现为刺激或说明屏幕
  • 通过灵活和方便的使用对齐选项来精确定位图像和文本
  • 刺激屏幕的显示和显示器的刷新率同步,保证高度可控制的展示率。
  • 以毫秒为单位输入刺激呈现时间。DirectRT将决定屏幕刷新率,将呈现屏幕刷新率数量的呈现,会非常接近您指定的间隔。每个会话的实际显示时间将被写入日志文件。

随机化和试验结构

  • 单个区组的随机化试验
  • 随机化的试验区组的显示顺序
  • 随机化选择集合中哪个项目被呈现
  • 极其灵活的试验设计,可以从一个试验更改到下一个试验
  • 直接从输入文件定义刺激或参考刺激列表
  • 按顺序,随机或随机不重复的从列表中访问刺激
  • 以任何格式创建尺度响应值和多项选择问题
  • 当在任意试验中特定按键被按下时跳过模式的功能
  • 跳转功能-根据按下的按键,您可以让DirectRT跳转到不同的事件(比如一个反馈序列),当事件停止后继续运行。
  • 步调或受限时间响应的选项
  • 重复那些在运行时刺激会被随机选择的试验

显示

  • 方便的以格式化文本创建全屏说明
  • 呈现全彩色图形,可以是全屏幕大小和640x480 到 1024x768的任意分辨率
  • 按顺序或同时呈现多个图像和/或文本
  • 叠加您创建的自定义图像(比如特殊评定量表)到任何其他的图像或文本上。对于事前检测和评分可视化刺激来说非常棒。
  • 从Microsoft PowerPoint和其他演示软件中捕获屏幕,并把他们在您的试验中呈现为刺激或说明屏幕
  • 通过灵活和方便的使用对齐选项来精确定位图像和文本
  • 通过字体和显示颜色的选择来创建多个样式设置

数据

  • 把数据写入方便分析的ASCII格式文件。
  • 增加可选变量到数据文件,用以识别主题试验条件,使得更容易分析。
  • 把所有数据写入到单独的文件,能够直接导入到Excel或SPSS
  • 包括方便合并从不同计算机搜集的数据文件的工具
  • 每次运行产生2个数据文件-一个是简化的,方便用于大部分母的,另外一个比较详细的”日志”版本,记录了所有信息,包括真正的刺激呈现时间,以便您能够确保您的系统可以达到您需要的计时的能力。

其他特征

  • 方便的修改和重用您的输入文件试验
  • 您不需要学习一个新的编辑器!可以从您熟悉的电子表格应用中做任何事情(比如,Excel,Lotus,Quattro)。如果您知道如何使用其中某个,那么您就已经知道如何编辑DirectRT文件了。
  • 此外,和DirectRT(2000版或更高版本)结合在一起工作非常棒。只需要拖拉一个DirectRT会话到DirectRT调查表。DirectRT将要求DirectRT执行会话,并传递当前主题和条件IDs.当DirectRT结束后,DirectRT将继续后续工作。这对于分配多个DirectRT输入文件为一个主题因子间功能来说是个不错的方法。
  • 方便的从命令行提示运行,以便您可以调用会话和从您自己的程序无缝执行它。您甚至都不用退出您自己的程序。
  • 上下文敏感帮助,比如在任何时候按下F1将切换帮助到您正在执行的工作相关的内容。
  • 容易使用的交互式界面-无需编程
  • 分辨率独立:兼容屏幕显示从640x480 到 1024x768.

系统需求

强烈推荐运行DirectRT的系统至少要有256MB内存,显存16MB的显卡,500MHZ以上的处理器。DirectRT产生的日志文件将显示给您看是否正在考虑的计算机可以处理您的实验设计。

最后,也需要安装一个电子表格应用程序(比如Excel),如果您计划编辑或查看DirectRT输入和输出文件,或您计划查看DirectRT在线指南。所有的输入和输出文件保存为.CSV格式,这可以从任何的标准电子表格程序中编辑。

Do you have tasks in which you measure RTs that average less than 1000ms? Do you have tasks in which stimulus onset and presentation times are seriously expressed in milliseconds and not seconds? Are you comfortable with the "blocks of trials" concept?  If so, then you've come to the right place--DirectRT can dramatically simplify your life. 

Powerful and easy to use
With DirectRT you can quickly and easily create reaction time tasks that require precision timing. You will be able to easily obtain accurate high speed response input from keyboards, mice, joysticks, microphones and external hardware. Present sound, video, images and text with exacting precision. You will be amazed at how DirectRT can make this so easy.

Windows can accomodate precision
Windows has traditionally been a very chaotic environment for precisely controlling the timing of events. The development of Microsoft’s DirectX has changed all this for psychological research. DirectX based programs can now manipulate images and sound and monitor input activity at the millisecond level. All this with incredible reliability. Dust off your old oscilloscope and see for yourself! DirectRT is 100% DirectX. 

You’ll never go back
DirectRT comes with extensive on-line help files, an easy-to-follow 100-page manual and an on-line tutorial with over 40 samples that illustrate simple and advanced techniques. Using Microsoft Excel as its editor, you can create, copy, paste and modify trials in no time. Although we now offer millisecond accurate keyboards and button boxes, DirectRT also works great with most third party external hardware. Even with a standard USB keyboard, serial mouse, joystick, or sound card microphone, error is remarkably low. Bottom line is that DirectRT will help minimize timing error associated with most hardware.

General Features and Response Times

  • Timing resolution of 1 millisecond.
  • Response timing is synchronized with the screen display so timing always begins when the screen first begins to draw (eliminates 10-17 milliseconds of random error).
  • Works with Windows to pause all other system events while timing is taking place. With everything else put on hold, the highest processing priority possible is given to DirectRT during the critical time intervals on each trial.
  • Uses Microsoft’s DirectX to gain the fastest access possible to input events from the keyboard, mouse, joystick and soundcard.
  • Optionally define minimum and maximum response times and deliver custom message screens for each when violated.
  • Collect multiple response times on a single trial.
  • Collect key release response times in addition to key press times.
  • Define valid keys for any response.
  • Define 'correct' key for any response.
  • Optionally require a correct response (see the IAT sample).

Input Options

  • Keyboard, mouse, and joystick input for single keypress or button responses.
  • Short open ended (fill-in-the-blank) responses.
  • Voice responses via microphone connected to your soundcard (ask us about a test you can do to see if your sound card can handle it).
  • Option of saving voice responses as wav files on your hard drive.
  • Continuous joystick motion.
  • TTL signals can be read from a defined port to gather data from external equipment.

Stimulus Presentation

  • Create as many different displays as you need for any given trial.
  • Play sound files.
  • Can handle multiple simultaneous and/or sequential sound files, with control over left/right panning and frequency (Hz). Easily synchronized with visual stimuli.
  • Send precisely synchronized TTL signals to communicate with external equipment (e.g., another computer controlling physiological equipment).
  • Present subject's own responses to open ended questions as stimuli in the same session.
  • Easily create full screens of instructions with formatted text.
  • Create multiple style settings with choices of fonts and display colors.
  • Present full colour graphics that can be as large as full screen and in any resolution from 640x480 to 1024x768.
  • Present multiple images and/or text in succession or simultaneously.
  • Superimpose custom graphics you make (e.g., special rating scales) over any other image or text. Great for pretesting and rating visual stimuli.
  • Capture screens from Microsoft PowerPoint and other presentation software and present them as stimulus or instruction screens in your experiment.
  • Precisely locate images and text with flexible and easy to use alignment options.
  • Display of stimulus screens is synchronized with the monitor’s refresh rate resulting in highly controlled presentation rates.
  • Enter stimulus presentation times in milliseconds. DirectRT will determine the screen refresh rate and will present the stimulus for the number of screen refreshes that will comes closest to your specified interval. All actual display times are written to a log file for each session.

Randomization and Trial Structure

  • Randomize trials within a single block.
  • Randomize the order that blocks of trials are presented.
  • Randomly select which items from a set are presented.
  • Extremely flexible trial design which can change from one trial to the next.
  • Define stimuli directly in the input file or refer to stimulus lists.
  • Access stimuli from lists sequentially, randomly, or randomly without replacement.
  • Create scale responses and multiple choice questions in any format.
  • Skip pattern capability when a particular key is pressed on any trial.
  • Jump capability -Depending on which key is pressed you can have DirectRT jump to different events (e.g., such as a feedback sequence) and then resume where it left off.
  • Option of self-paced or time-limited responses.
  • Repeat trials for which stimuli were randomly selected at run-time.

Display

  • Create scale responses and multiple choice questions in any format.
  • Easily create full screens of instructions with formatted text.
  • Present full colour graphics that can be as large as full screen in any resolution from 640x480 to 1600x1200 and beyond.
  • Present multiple images and/or text in succession or simultaneously.
  • Superimpose custom graphics you make (e.g., special rating scales) over any other image or text. Great for pretesting and rating visual stimuli.
  • Capture screens from Microsoft PowerPoint and other presentation software and present them as stimulus or instruction screens in your experiment.
  • Precisely locate images and text with flexible and easy to use alignment options.
  • Create multiple style settings with choices of fonts and display colors .

Data

  • Writes data to an easy-to-analyze ASCII file.
  • Add optional variables to the data file that identify within subject trial conditions-makes for much easier analysis.
  • Writes all data into a single file that can be imported straight into Excel or SPSS.
  • Includes a utility to easily merge data files collected on different computers.
  • Produces two data files per run-one that is simplified and easy to use for most purposes and a more detailed ‘log’ version that records everything including actual stimulus presentation times so you can ensure that your system is capable of achieving the timing you need.

Other Features

  • Easily modify and re-use your input files experiments.
  • You don’t have to learn a new editor! Do everything from your favourite spreadsheet application (e.g., Excel, Lotus, Quattro). If you know how to use one of these, then you already know how to edit DirectRT input files.
  • Also works great in combination with MediaLab. Just drop a DirectRT session into any MediaLab questionnaire. MediaLab will ask DirectRT to execute the session and will pass along the current subject and condition IDs. When DirectRT is finished, MediaLab will resume where it left off. This is a great way to assign multiple DirectRT input files as a function of between subject factors.
  • Runs easily from a command line prompt so you can call the session and execute it seamlessly from your within own programs. You would never know you left your own program.
  • Context sensitive help such that pressing F1 at any time will help you with what you are currently doing.
  • Easy-to-use intuitive interface--no programming code necessary.
  • Resolution independent: compatible with screen displays from 640x480 to 1024x768.

 

 

 

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