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1.
The relationship between flavor evaluative conditioning and contingency awareness was examined in two experiments using flavored
drinks. In Experiment 1, one flavor was always paired with sugar and the other with bitter tween (polysorbate20) during conditioning. In a subsequent test phase, participants tasted the two flavors, and their evaluative ratings indicated
an overall preference for the sugar-paired flavor. Moreover, participants were generally able to report which flavor had been
paired with sugar and which with tween. This finding was replicated and confirmed in Experiment 2A. Furthermore, in both experiments,
evaluative conditioning was seen only in those participants who were aware of the contingencies. Experiment 2B demonstrated
that evaluative conditioning does not occur to colors, although participants are contingency aware. The differences between
the present findings and prior studies, in which apparently unaware flavor conditioning has been found, are discussed. 相似文献
2.
Rats tend to prefer flavors previously consumed under low deprivation to flavors previously consumed under high deprivation (Capaldi & Myers, 1982). We attempted to distinguish among possible associative explanations by determining whether this conditioning phenomenon was based upon conditioned preferences, conditioned aversions, or both. We compared preference for flavors presented exclusively under either high or low deprivation with preference for a neutral flavor. In Experiments 1A and 1B the neutral flavor was one that had been randomly paired with both high and low deprivation, whereas in Experiments 2 and 3 the neutral flavors had not been associated with either high or low deprivation. Our results strongly suggest that this conditioning phenomenon is based upon an actual increase in preference for the flavor consumed under low deprivation rather than on any form of aversion conditioning. 相似文献
3.
Israel Ramirez 《Learning & behavior》1994,22(2):181-187
Rats were trained to associate artificial cherry or grape flavors with 1% starch suspensions. Conditioning was assessed by offering the rats a choice of the cherry versus grape flavors without starch. Conditioned preferences were moderately strong and persistent; 3 days of conditioning produced a preference that did not fully extinguish within 18 days. Food deprivation substantially increased intake of 1% starch suspension, However, the degree of preference conditioned was not influenced by the availability of food during the conditioning period; the rats that had been food deprived during training acquired as strong a preference as did those fed freely during training. The degree of preference obtained was similar in the rats given reinforcing and nonreinforcing fluids simultaneously or sequentially. Starch conditioned a slightly stronger preference than did the same concentration of glucose, even though these substances contain the same amount of calories. A statistically significant, but weak, preference was conditioned by 0.5%, but not by 0.25%, starch. It is proposed that the flavor of starch, independent of its calories, is reinforcing to rats. 相似文献
4.
Bow Tong Lett 《Learning & behavior》1980,8(2):193-198
The present experiments assessed cue utilization in pigeons and quail on similar tests of poison-based aversion learning. In Experiments 1 and 2, three groups of pigeons were given colored water, flavored water, or colored flavored water prior to induction of sickness; these experiments differed only as to the specific colors and flavors used as stimuli. In both experiments, the birds trained with flavored water exhibited reliable taste aversions when tested with uncolored flavored water. Similar degrees of aversion were observed whether the flavored water had been colored or uncolored during training, suggesting that the color cue had little or no effect on the conditioning of the flavor cue. In contrast, the flavor cue had a pronounced effect on the conditioning of the color cue. When tested with unflavored colored water, the birds trained with colored flavored water exhibited significantly stronger color aversions than those trained with unflavored colored water. That is, the flavor cue enhanced or potentiated the conditioning of the color cue. In a third experiment, quail were trained in the same way as the pigeons with virtually the same result. The pattern of cue utilization observed in the present experiments with pigeons and quail differs markedly from that proposed by Wilcoxon, Dragoin, and Kral (1971) for quail. However, a reexamination of the results obtained by Wilcoxon et al. suggested that they are susceptible to an alternative interpretation consistent with the present results. 相似文献
5.
Anthony Dickinson 《Learning & behavior》1976,4(4):416-420
In Experiment 1, four groups of rats received conditioned suppression training in which a tone was reinforced with shock. If the tone had been previously paired with response-independent food, aversive conditioning was slightly facilitated by comparison to control groups preexposed either to the tone randomly associated with food or to the tone and food unpaired. However, by comparison to a control which was not preexposed to the tone, animals receiving prior pairings of the tone and food showed retarded aversive conditioning. Experiment 2 replicated the facilitation in aversive conditioning after the tone had been paired with food relative to the random control condition and demonstrated that this difference occurred even if the tone and background stimuli continued to be associated with response-independent food during aversive conditioning. This result suggests that pairing a stimulus with an appetitive reinforcer reduces the retardation of aversive conditioning produced by stimulus preexposure. 相似文献
6.
18世纪初,随着大量的茶、咖啡和糖被荷兰、英国进口和分销到西欧市场,欧洲全球大众消费便拉开序幕。在整个18世纪,茶和咖啡的价格迅速下跌使平民能够消费这些商品。因此,18世纪下半叶,茶、咖啡和可可成为欧洲人,尤其是市民的普通饮品。当时有一种非常形象的说法,当18世纪末曼彻斯特的一名工人在享用"跨越大陆的一杯茶"的时候,他从中获得四大洲的能量。这杯茶包括中国或锡兰的茶、荷兰或英格兰的代尔夫特瓷茶杯、非洲奴隶生产的南美糖。糖的热量和茶、咖啡的咖啡因能够为从事高强度劳动的工人提供所需能量和兴奋剂,它们的普及在某种程度上加速了18世纪末欧洲工业革命进程。 相似文献
7.
F. J. Odling-Smee 《Learning & behavior》1978,6(1):43-51
Two experiments investigated the capacity of a nominal CS to overshadow background stimuli. Rats received CS-shock pairings in one compartment of a double-compartment apparatus. After training, the shock compartment was re-presented but in the absence of both the CS and shock, and overshadowing was assessed by measuring the rats’ latency to enter the compartment. In the first experiment, predictive values of temporal cues provided by CS onset and CS offset were manipulated. Rats readily entered the shock compartment, provided shock onset had previously been predicted by CS onset or CS offset. This indicates that background cues in the shock compartment had acquired little associative strength during training. In contrast, rats avoided the shock compartment under every condition in which shock onset had not previously been predicted by either CS onset or CS offset. In the second experiment, a precise temporal cue provided by CS onset was dissociated from other factors arising from CS-shock contiguity. It was found that rats’ reactions to the shock compartment after training was governed by both temporal and contiguity factors. The results are relevant to theories which state that conditioning is a function of a competitive relationship between stimuli present in an animal’s environment during training. 相似文献
8.
Animals were presented with (1) one solution which differed from that of the test solution, (2) a series of distinctly flavored solutions whose flavors differed from that of the test solution, or (3) with a flavored solution whose flavor was the same as that of the test solution. When animals received the solution whose flavor was the same as that of the test solution prior to a test for neophobia and prior to a conditioning trial, neophobia was reduced and aversions were weakened. However, when animals received a solution or a series of solutions whose flavors differed from that of the test solution, neophobia was reduced but conditioned aversions were unaffected. Presentations of solutions that differed from the test solution following aversion formation left the association between the taste of the test solution and the effects of the aversion-inducing treatment intact. In a final experiment it was discovered that neophobia was reduced as much when animals drank solutions whose flavors changed every third day as when they drank the same solution throughout testing. 相似文献
9.
Response summation in pigeons was examined in four experiments. In Experiment 1, summation was not found with a compound of two visual stimuli on a television screen after they had individually been used for instrumental conditioning. In this experiment, the training and test trials were separated by an interval during which the television screen was dark. Summation was found in Experiment 2 for which the television screen was permanently white during the interval between trials and in the region that was not occupied by the experimental stimuli. These results were replicated using a within-subject design (Experiment 3) and autoshaping (Experiment 4). Experiment 2 also revealed summation with compounds of auditory and visual stimuli, but not with compounds of two auditory stimuli or two diffuse lights. The results can be explained by a variety of theories of learning, if they take account of generalization between the stimuli. 相似文献
10.
Alexander F. Luongo 《Learning & behavior》1976,4(3):225-230
In three experiments, rats were presented compound solutions consisting of a common element, saccharin, mixed with one of two different flavor elements, cinnamon and wintergreen. Rats in the experimental groups consistently received a toxicosis-inducing injection following one compound solution but not following the other compound solution. Rats in the control groups received toxicosis-inducing injections half the time following each of the compound solutions. After training in each experiment, there were tests for conditioning to the saccharin alone. The experimental groups drank significantly more than the control groups, indicating that the aversion to the partially reinforced saccharin in isolation was less when the different flavor cues were more highly correlated with reinforcement. In Experiment III, there was also a test for conditioning to the cinnamon or wintergreen flavor alone. The experimental group drank significantly less of the continuously reinforced flavor than the control group did of the partially reinforced flavor. These results are similar to those reported within more traditional conditioning paradigms. 相似文献
11.
Nancy A. Marlin 《Learning & behavior》1983,11(3):290-294
Three experiments investigated the question of whether a spatial stimulus, a context, could function as S1 in a second-order conditioning procedure. In each experiment, rat subjects were presented with S1-US pairings by being given footshocks in one of two contexts. Forty-eight hours later, the experimental groups received S2-S1 pairings, during which a tone was presented in the training context. As measured by a lick-suppression test administered in a third context, rats were more fearful of the tone if it occurred in the context in which they had previously been shocked. The training context in each experiment apparently served to establish second-order fear conditioning to the tone. 相似文献
12.
Crisis response in the public schools: A survey of school psychologists' experiences and perceptions
In this study, 228 school psychologists completed a survey regarding crisis intervention teams and plans. The majority of respondents indicated their schools had crisis plans (95.1%) and teams (83.6%). The most common team activities endorsed by participants involved providing direct assistance and services to students, staff, and the media. The majority of participants (93%) reported that their schools had experienced and responded to serious crises. Respondents indicated that psychological debriefing was frequently used (generic 49.1% and standardized 17.9%). Less than half of the participants (44.3%) reported that meetings were conducted with parents and community members following a crisis. Nearly all of the participants (98.2%) reported that they had some type of crisis intervention training. However, many participants suggested that additional training and practice with crisis intervention would improve schools' crisis responses. Results are discussed with implications for school psychologists to improve their schools' crisis intervention plans and teams' responses. © 2007 Wiley Periodicals, Inc. Psychol Schs 44: 749–764, 2007. 相似文献
13.
Peter C. Holland 《Learning & behavior》1989,17(3):269-279
In three experiments, transfer effects in appetitive serial feature-positive discrimination procedures (X→A+,A?) were examined with rat subjects. Nonreinforced presentations of the feature (X) alone had little or no effect on that cue’s ability to modulate responding to the target cue with which it had originally been trained (A) but enhanced its ability to modulate responding to another cue (B), which had been the target within another serial feature-positive discrimination (Y→B+,B?). These effects were observed when the nonreinforcedX presentations occurred either concurrently withX→A+,A? training or afterward. Regardless of whether or not nonreinforcedX presentations were administered,X did not modulate responding evoked by a cue that had not been trained within a serial feature-positive discrimination. These data help resolve conflicts in published reports of transfer or its absence in this conditioning situation, and shed light on the nature of the modulatory or occasion-setting powers of feature cues in serial feature-positive discrimination learning. 相似文献
14.
《Early childhood research quarterly》2003,18(1):104-120
Given the importance of effective teaching to children’s development in child care and the difficulty of keeping highly educated teachers in the field, we examined pathways to effective teaching within a group of primarily African-American and Latino teachers working in child care programs serving low-income children. We used classroom observations to assess effective teaching, and clinical interviews and participant observation to understand pathways. Less than one-quarter of the teachers had BA degrees or higher. Only 20% of the teachers had had preservice training, and almost all of the teachers with preservice experiences were the BA level teachers. Over half of the teachers had been mentored as they began teaching either as a mother volunteer or as a beginning teacher. About 40% of the participants talked of staying in the field because of feeling responsible to and for a community; the remainder talked of staying for the children. About 40% of the participants experienced reflective supervision. The participants in this study, even those with less formal education than a BA degree, were more responsive and more engaged with children than participants in two more representative studies. In this sample, after controlling for formal education, responsive involvement could be predicted by staying in the field for the community, being mentored and being supervised. Engaging children in language play could be predicted by formal education and being supervised. Providing language arts activities could be predicted by formal education, being mentored and being supervised. 相似文献
15.
《Contemporary educational psychology》2001,26(3):418-428
This experiment addressed the question of how headings influence readers' memories for text content. College students read and recalled a 12-topic expository text. Half of the participants were trained to construct a mental outline of the text's topic structure as they read and then use their mental outlines to guide their recall attempts. The remaining participants did not receive such training. Half of the participants read a text containing headings before every subsection; the other half read the same text without headings. The results were that participants who received training and/or read the text with headings remembered text topics and their organization better than participants who received no training and read the text without headings. The results support the hypothesis that signals induce a change in readers' strategies for encoding and recalling text. 相似文献
16.
Conditioned suppression in rats is often unaffected when the context (or set of background stimuli) is changed following conditioning. This suggests that responding to the conditioned stimulus (CS) can be relatively insensitive to the context in which the CS is presented. In two experiments, we examined whether sensitivity to contextual stimuli is affected by preexposure to the CS. In Experiment 1, when the CS was novel at the outset of conditioning, conditioned suppression was not affected when the context was changed following conditioning. However, when the CS had been preexposed, responding was weaker when extinction occurred outside of the conditioning context. In Experiment 2, responding was again sensitive to the test context, regardless of whether preexposure occurred in the conditioning context or in an alternate context. These results suggest that the extent to which responding is sensitive to context can depend on the conditioning history of the CS. 相似文献
17.
In the present experiments, the outcome specificity of learning was explored in an appetitive Pavlovian backward conditioning procedure with rats. The rats initially were administered Pavlovian backward training with two qualitatively different unconditioned stimulus conditioned-stimulus (US-CS) pairs of stimuli (e.g., pellet --> noise or sucrose --> light), and then the effects of this training were assessed in Pavlovian-to-instrumental transfer (Experiment 1) and retardation-of-learning (Experiment 2) tests. In the transfer test, it was shown that during the last 10-sec interval, the CSs selectively reduced the rate of the instrumental responses with which they shared a US, relative to the instrumental responses with which they did not share a US. The opposite result was obtained when the USs (in the absence of the CSs) were presented noncontingently. In the retardation test, conditioned magazine approach, responding to the CSs was acquired more slowly when the stimulus-outcome combinations in the backward and the forward conditioning phases were the same, as compared with when they were reversed. These results are collectively in accord with the view that Pavlovian backward conditioning can result in the formation of outcome-specific inhibitory associations. Alternative views of backward conditioning are also examined. 相似文献
18.
Alba E. Mustaca Fabian Gabelli Mauricio R. Papini Peter Balsam 《Learning & behavior》1991,19(2):125-138
Appetitive contextual conditioning in rats and ringdoves was investigated in six experiments. In Experiment 1, differential contextual training produced greater anticipatory activity in rats in the presence of a context paired with food than it did in rats in the presence of a different context in which food was never presented. Furthermore, the rats showed a preference for the context associated with food when they were given a simultaneous choice test between contexts. In Experiment 2, rats were more active in and preferred a context associated with a variable-time 30-sec (VT30) schedule as opposed to a VT180 schedule. Experiment 3 was a between-subjects replication of the previous experiment. As expected, rats exhibited significantly more anticipatory activity in a context in which food had been presented on a VT30 schedule than they did in a context in which food had been presented on a VT180 schedule. Experiment 4 showed that anticipatory activity was a reflection of context-US associations in ringdoves, and in Experiments 5 and 6, ringdoves also exhibited an inverse relationship between the. amount of anticipatory activity and the length of the interreinforcement interval (IRI). These results reveal a relation between ERI and contextual conditioning opposite from that obtained in studies of aversive conditioning. 相似文献
19.
Mary Ann Balaz Sharon Capra Wesley J. Kasprow Ralph R. Miller 《Learning & behavior》1982,10(2):242-248
Previous research in our laboratory has found superior performance when classically conditioned responses are observed in the training context as opposed to outside it, even when direct context-US associations have been minimized by either the choice of conditioning parameters or extinction to the context. The present experiment used latent inhibition of the conditioning context as an alternative method of examining contextual cue effects in the absence of appreciable direct context-US associations. Water-deprived rats received tone-footshock pairings in one of two distinctly different apparatuses, but all were tested in a common apparatus. Animals conditioned in the test enclosure displayed more lick suppression than those conditioned outside the test enclosure. Other animals tested without the tone present also exhibited more suppression if conditioning had occurred in the test context rather than outside it, indicating that direct associations between the conditioning context and shock had been formed. However, when formation of direct associations to the conditioning context was attenuated in additional animals through extensive preexposure to the context prior to conditioning, more suppression to the tone was still seen when conditioning had occurred in the test context rather than outside it. These results add support to the position that the training context augments recall even when direct associations between the context and the US are attenuated. The phenomenon is discussed in terms of facilitated retrieval of nominal CS-US associations, configural retrieval cues, and conditional discriminations. 相似文献
20.
In the present study, we investigated the degree to which responding would resurge in children diagnosed with Autism Spectrum
Disorders (ASD) following an intervening training period comprising different schedules of reinforcement. Twenty-four children
of the ages 7–15, with a diagnosis of an ASD, were taught a play a sequence on a variable ratio- (VR) 3 schedule of reinforcement,
during a 30-min session. The play sequence was then extinguished before the participants were taught a second play sequence,
using a VR-4 schedule for 30 min, a VR-4 schedule for 60 min, or a VR-2 schedule for 30 min. A 5-min extinction session was
then conducted to determine the impact that the intervening schedules had on the resurgence of the original behavior. The
original sequence resurged to a greater extent for Group VR-4 30 min than it did for the other two groups. The results provide
evidence that the length of time between initial training and testing is not a prime determinant of the level of resurgence,
but that the amount of conditioning may play a stronger role: The greater the number of reinforcers received, the smaller
the resurgence effect. 相似文献