Link:
http://jocn.mitpress.org/cgi/content/full/16/2/189?maxtoshow=&HITS=10&hits=10&RESULTFORMAT=&author1=rhodes&searchid=1079971126676_190&stored_search=&FIRSTINDEX=0&sortspec=relevance&journalcode=jocn
Honors Thesis Presentations
Friday, April 16th, 2004 at 4p.m.
METCALF RESEARCH BUILDING, ROOM 129
4:00
Elizabeth Kyonka
"Finescale Analysis of Bouts of Responding Under
Fixed Schedules of Reinforcement"
All non-unique events occur with some distribution in time. Many behaviors observed in nature and in the laboratory do not occur at a uniform rate but rather cluster together in bouts. To determine whether bouts of responding are affected by the duration of the interval of reinforcement, twelve rats received four fixed-interval schedules of temporal conditioning. Whereas the rate and pattern of the rats' responding were schedule-dependent, response bouts were invariant across schedules of reinforcement. The ubiquity of bouts in all types of behavior and invariance of bouts of responding suggest that bouts may be a more relevant unit of behavior than single instances of behavior.
4:30
Jennifer Kim
"Brain Activation for Spatially and
Non-spatially Cued Arbitrary Association Learning"
Arbitrary visual-motor associations require relating a visually presented stimulus with a specific motor response, where the stimulus does not intrinsically provide any guidance of the correct motor response. Many animal, and more recently human, studies have begun to investigate neural activation patterns underlying learning and processing these types of associations. However, only one previous study to our knowledge, by Deiber et al. (1997), has attempted to investigate how associations based on different stimulus properties affect the activation patterns observed. In this study, we attempted to confirm and extend the results obtained by Deiber et al. (1997) by investigating how spatial and non-spatial cues of a visual stimulus affect learning and rehearsal stages of acquiring novel visual-motor arbitrary associations. Our event-related paradigm coupled with trial classification based upon performance and experience allowed us to investigate the processing of visual-motor arbitrary associations at multiple stages, based upon individual factors. Our data support dorsal ("where") and ventral ("what") stream specialization for arbitrary associations throughout learning and rehearsal. Our data also support previous observations that prefrontal regions are more greatly activated during the beginning stages of learning, while parietal regions are more active during the rehearsal stages. Finally, we were able to determine the differential influence of stimulus and feedback presentations across various learning stages and demonstrated that the encoding of stimulus properties during the stimulus presentation required distributed neural activation. By employing more temporally resolute analyses, we were able to distinguish similarities, differences and interactions between conditions dependent on stimulus property and experience.
5:00
Hadley Tassinari
"Stereo and Motion Information are not Independently
Processed by the Visual System"
Current theories of cue combination postulate independent modules in the visual system for separate cues to depth. Each modules yields an estimate of depth which always includes an amount of noise. Estimates are combined in a statistically optimal fashion by a maximum likelihood estimator to arrive at a final depth percept. The most widely accepted model of cue combination was proposed by Landy et al. (1995), termed the Modified Weak Fusion (MWF) model, which holds that independent estimates of depth interact in an early stage to achieve promotion, then combine in an optimal fashion based on reliabilities assigned to each estimate. The final depth percept is derived from a weighted average of each module's output. A new theory, termed the Intrinsic Constraint (IC) model (Domini et al., 2003; DiLuca et al., 2003), has been proposed which postulates that the visual system takes into account the natural covariation of depth cues such as motion and stereo in the environment and utilizes this constraint in visual processing. For example, velocities and disparities on the retinae are necessarily related to one another: plotted in a bi-dimensional space, these values are constrained on a single line. The IC model thus reduces the dimensionality of the problem of cue integration as depth percepts are derived directly from a single underlying dimension. In this work, the IC model is described and its predictions are compared with that of the MWF model. In three experiments we show that cue integration cannot be accounted for by a linear combination of depth-cues, as predicted by the MWF model. Rather, the IC model well predicts the non-linear results found in this investigation. It is further shown that non-linear results cannot be explained as the outcome of a process of dynamic re-weighting. Based on these results we argue that the IC model is a more plausible solution to the problem of depth cue integration.
Refreshments will be served before the talk in Room 124-125
Holiday Inn Sarasota 1-800-892-9174
Temple Habonim Sisterhood
Presents
An Afternoon at the Spa
Pamper-yourself silly
When: April 25 at 2:30 p.m.
Where: Temple Habonim
165 New Meadow Road
Alayne White and her team of spa goddess from Alayne White Spa and Body Boutique will act as beauty and skin-care facilitators/consultants. They will walk us through facials, hand massage, foot treatments and relaxation techniques.
All you need is a robe! And they supply the expertise, advice and products.
GOODY BAGS FOR EVERYONE!!!
· Your participation keeps alive a critical support network of women who enhance the Temple, its school and each other’s lives. In the last two years your contribution to the Sisterhood has brought many gifts to the temple.
· Without your dues ($36; $500 lifetime; new members first year is complimentary), the Sisterhood could not accomplish all these incredible things.
· The SPA AFTERNOON costs $30 for sisterhood members/$35 for non-members (If dues of $36 are included, you pay member fee.)
If you have questions, call Faye Zuckerman at 247-9243.
Receipt and Itinerary as of 04/13/04 05:12PM
* * * * * * * * * * * * * * * *
Confirmation Number: HV2UPL
Confirmation Date: 04/13/04
* * * * * * * * * * * * * * * *
Received: DAVID SH
Passenger(s):
SHEINBERG/DAVID 526-2796038311-0
Itinerary:
Friday, April 30 - PROVIDENCE RI(PVD) to TAMPA INTL(TPA)
Flight 332 H
Depart PROVIDENCE RI(PVD) at 01:35PM and
Arrive in TAMPA INTL(TPA) at 04:40PM
Wednesday, May 05 - TAMPA INTL(TPA) to PROVIDENCE RI(PVD) Flight 759 B Depart TAMPA INTL(TPA) at 10:20AM and Arrive in PROVIDENCE RI(PVD) at 01:10PM
***************************** COST ***************************** Total for 1 Passenger(s)
AIR: ........................$258.61
TAX: ........................$25.59
PFC: ........................$7.50
SECURITY FEE: ...............$5.00
___________________
Total Fare: $296.70
*********************** PAYMENT SUMMARY ************************
Current payment(s)
13APR2004 AMER EXPRESS xxxxxxxxxxx3006 Ref 526-2796038311-0 $296.70
Total Payments: $296.70
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NON REFUNDABLE / STANDBY REQ UPGRADE TO FULL Y FARE
All travel involving funds from this Confirm no. must be
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Fare Calculation:
ADT- 1 PVDWNTPA H7NSTRNR 119.00 TPAWNPVD B7NR 159.00 $278.00 ZPPVD TPA XFPVD3.00 TPA4.50 AYPVD2.50 TPA2.50 $296.70
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