Opa is a text presentation program designed to be used by researchers conducting speech production experiments.
What does Opa let you do?
· Display words (optionally on a second monitor).
· Place words within a carrier phrase.
· Randomise the presentation of words.
· Ensure that certain word combinations are not presented on consecutive trials.
· Loop the presentation so that all words are displayed x number of times.
· Judge a participant’s productions as either good or try again.
· Append rejected productions of words to the end of the list, so that you may have x number of approved recordings.
· Log the presentation order of words and researcher ratings in a results file.
What are the advantages of using Opa?
· It is small (384KB) - memory footprint is negligible.
· Present text in any language.
· The Opa algorithm allows for complex randomisation.
· User centred design – Opa status bar displays onscreen text (including the carrier phrase), allowing the researcher to know what the participant can see at all times.
· It is free – created in-house by MARCS programmer Johnson Chen.
Opa was designed for Windows XP and requires the Microsoft .NET 1.1 framework.
For detailed instructions, please download the Opa manual that I created.