Research shows that human operant behavior typically differs from non-human operant behavior on schedules of reinforcement. These differences in performance may be related to differences between the experimental preparations used to study human and non-human operant behavior. One such difference is the type of reinforcer used. This experiment analyzed the differential effects of points alone, points backed up by money, and sounds on schedule performance of human subjects. Results show that sounds generated moderate rates of responding, capable of change in either direction. When points backed up with money were the reinforcers, however, high rates of behavior were generated, disrupting the previously established baseline performance. This suggests that while points may be effective in generating high rates of behavior, they may be ineffective in producing sensitive baselines needed to study human operant behavior on schedules of reinforcement.

An examination of the effectiveness of seeding, burning, and mowing in the reestablishment of tallgrass prairie species on overgrazed and abandoned pastureland. The study site is a 20 acre tract on U.S. Corps of Engineers land below Lake Lewisville in Denton County, Texas. The site was partitioned into thirty-nine 40 by 40 meter plots with seeding (carried out in 1996) and management treatment (burning, mowing, and no maintenance carried out in 1998) randomly applied following a two level design. For each plot, nine stratified-random 0.1 m2 subplots were examined and shoot counts for each species recorded. The effects of the treatments on individual species and species richness were analyzed with a two-way ANOVA followed by a SNK multiple range test, both on ranked data. Community level analysis was conducted with both a MANOVA on ranked data and a Canonical Correspondence Analysis on raw data. Results indicate that seeding positively affected species richness, particularly when combined with either burning or mowing in the early spring. Mowing also significantly increased species richness in areas that were not seeded, while burning negatively affected species richness on unseeded plots. Treatments significantly affected community composition with treatments having the most clear effect on spring and …

Weekly newspaper from Sanger, Texas that includes local, state, and national news along with extensive advertising.

Weekly newspaper from Sanger, Texas that includes local, state, and national news along with extensive advertising.

Student newspaper from the University of North Texas in Denton, Texas that includes local, state, national, and campus news along with advertising. Formerly The Campus Chat.

Photograph of the courtyard outside the Longhorn Gallery on the Denton Square facing west with a fountain in the middle, surrounded by trees and various plants, with two benches in the back.

Photograph of the Denton courthouse on-the-square, a four-story brick building with several domes, taken from the Longhorn Gallery courtyard facing East; there are trees and plants in the foreground and cars parked in front of the courthouse.

Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.

Photograph of a historic property in Texas.

Monthly newspaper from Double Oak, Texas that includes news, information, and entertainment for residents of the Double Oak community along with advertising.

Weekly newspaper from Sanger, Texas that includes local, state, and national news along with extensive advertising.

Weekly newspaper from Sanger, Texas that includes local, state, and national news along with extensive advertising.

Student newspaper from the University of North Texas in Denton, Texas that includes local, state, national, and campus news along with advertising. Formerly The Campus Chat.

Student newspaper from the University of North Texas in Denton, Texas that includes local, state, national, and campus news along with advertising. Formerly The Campus Chat.