Abstract: Methods and apparatus for firing a projectile according to various aspects of the present invention comprise a stock capable of holding a projectile, a spring attached to the stock such that stored elastic energy is used to impart a propulsive force to the projectile. The spring may also engage a retention device configured to hold the spring in a predetermined position thereby allowing elastic energy to be stored in the spring until the user desires to fire the projectile by disengaging the retention device.

Abstract: Methods and apparatus for a participant response system according to various aspects of the present invention operate in conjunction with an information system and an assessment system. The information system may store selection information in response to a first participant's selection of data choices from a set of candidate survey data. The assessment system is responsive to the information system, identifies a correlation between the selection information of the first participant and a set of comparison data.

Abstract: Methods and apparatus for a participant response system according to various aspects of the present invention operate in conjunction with an information system and an assessment system. The information system may store selection information in response to a first participant's selection of images from a set of candidate images. The assessment system is responsive to the information system, identifies a correlation between the selection information of the first participant and a set of comparison data.