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Features

WEXTOR has been continuously developed for years to ensure the best functionality, operation and security.
These features are currently available:



Design:

• complete and incomplete experimental designs
• experimental (between-subjects and within-subjects) factors
• quasi-experimental (natural) factors
• truly randomized distribution of participants to experimental conditions
• optional distribution of participants to experimental conditions based on levels of quasi-experimental factors
• random or fixed order of blocks
• design is displayed visually and as ordered list



Techniques specific for Internet-based experimenting (Reips, 2002):

• automatic avoidance of frequently made configuration errors in Web experimenting
• non-obvious, but logical naming of files and experimental conditions
• secure hosting
• randomly generated continuous user IDs for enhanced multiple submission control
• multiple site entry technique for control of sampling effects
• implementation of the high hurdle technique for drop-out control
• implementation of the warm-up technique that minimizes drop-out
• automatically generated meta tags (only current content served, shield against spam entries)



Measures:

• server-side response time measurement
• optional client-side response time measurement
• interactive dependent measures and materials (created via content wizard)
• visual analogue scales and radio button scales



Usability

• no need to deal with complex HTML and Javascript code
• works in Lab *and* Web
• visual display of experimental design, in terms of (clickable) folders and Web pages
• automatically generated display of experiment design and procedure, great for reports
• automatically generated code plan (great in teaching!)
• data available in Excel/SPSS compatible format and in log format
• just try it ;-)