Word Extraction Settings
Word extraction is an option to extract individual words when a trial consists of multiple words. Each word is stored in one sub-condition and processed. To set up word-extraction conditions for an experiment refer to the section on word extraction.
A sentence is tested for a new word every time there is pen-up. At this point, the following word extraction parameters are evaluated to decide whether a new word has started and whether the collection of sampling points since the previous pen-up or start of recording could be considered a new word.
o Minimum width (cm): If the width/space of a word is more than this value, it is treated as a new word.
~ If you increase this value to 0.5 cm (for example), then if there is a word of length 0.6 cm and a consecutive word of length 0.4 cm, the second word is also considered to be a part of the first word.
o Min horizontal leftward distance in cm between words (cm): If the distance corresponding to a pen-up duration within a line is more than this value, it is treated as a new word.
~ If you increase this value to 1 cm (for example), if there is word 1 and a consecutive word 2 at a distance of 0.5 cm, then the second word is also considered to be a part of the first word and new word is not recognized. In the case of a handwriting trial consisting of a sentence, it is recommended to have set this at a higher value and ask the user to leave some space between words.
o Min horizontal leftward penlift in cm between words (cm): For a handwriting trial with words, there is a few seconds penlift when the user moves from one word to another. The program keeps track of the distance and time (Pen-up time) for which pen is moved, when it is lifted just above the tablet while recording. If the distance the pen is moved is greater than the value specified, then there is a new word.
o Minimum downward distance between word beginnings (cm): If a sentence/line in a trial extends beyond a single line, then this value defines the distance in the downward direction after which the recording is treated as a new line.
o Min duration of penlift in seconds between words (s) and Max duration of penlift in seconds within a word (s): If the pen-up time is lesser than this value no new word will be detected. If the pen-up time is greater than the minimum then there is a new word.