We work with Perseus SurveySolutions/EFM 2.2, a very high performance SQL Server based system, which meets the highest professional quality standards. The numerous features include:

• Browser compatibility
• Recording of all attempts to access / hits (important for calculating return rates)
• Exclusion of repeat form filling (e.g. panel based, through login function on respondent lists or optional cookie setting at the end of the questionnaire)
• Recording of IP addresses, where necessary through retrospective data cleansing)
• Flexible layout
• Integration of multimedia elements
• Use of CSS styles (layout / style can be changed for the complete survey)
• Import function for survey text
• Answer categories and lists (Word, Excel)
• Standard texts for anonymity and data protection
• Flexible questionnaire design
• Ability to edit and modify the questionnaire script
• Different question types (simple / multiple choice, semantic differential, matrix question, selection of an open category “Other”, text question)
• Randomisation of possible answers (with one or more fixed alternatives)
• Correct representation of scales
• Status display (with correct use of filters)
• Ranking
• Numerical question
• Constant sum scale
• Online conjoint
• Randomisation at the line or column level
• Adaptive filtering (any iterations / branching)
• Conditions based on previous answers or master data for registered participants
• Subsequent reference to individual answers
• Plausibility checks (Has an entry been selected? Has text or a number been entered? Is the number entered within the defined range?)
• Combined plausibility checks across several questions / questionnaires
• Optional compulsory fields (respondent can skip questions or optionally be required to enter a response)
• Freely editable error messages with definition of various error types
• Optional password protection
• Optional SSL encryption
• Ability to recommence aborted interviews
• Support for multi-lingual interviews
• Import external parameters (URL / database)
• Utilisation of selected alternatives in subsequent questions
• Utilisation of previous answers in subsequent questions
• Data cleansing for filtering
• Optional “Back” button
• Disabling back function in questionnaires
• Scripts for pop-up surveys for the n-th visit or n-th visitor
• Quota module for controlling sample composition