ROCs in recognition with and without identification

Receiver operating characteristics (ROCs) for the recognition of unidentified word fragments were analysed and compared with ROCs for the recognition of identified word fragments. In all conditions reported here, the z-transformed ROCs (z-ROCs) for recognition without identification were linear, with slopes near 1.0. In contrast, the z-ROCs for recognition with identification each had both a linear and a quadratic component, and a slope of substantially less than 1.0. Because the recognition of unidentified word fragments likely results from a familiarity process, the present study examined how well the effect can be explained by global matching variants of signal detection theory. Global matching models predict that memory should be better for strong items from a mixed list than for strong items from a pure list, and should be worse for weak items from a mixed list than for weak items from a pure list; however, only the latter pattern was shown for the recognition of unidentified items.     

Odor recognition without identification

Odors are notoriously difficult to identify, yet an odor can often lead to a sense of recognition, despite an inability to identify it. In the present study, we examined this phenomenon using the recognition-withoutidentification paradigm. Participants studied either odor names alone or odor names that were accompanied by scratch-and-sniff stickers containing their corresponding scents. At test, the participants were presented with blank scratch-and-sniff stickers, half of which corresponded to items that were studied and half of which did not. The participants attempted to identify each test odor, as well as to rate the likelihood that it corresponded to a studied item. In addition, the participants indicated whether they were in a tip-of-the-tongue (TOT) state for a given odor’s name. Odor recognition without identification was found, but only when the participants had actually smelled the test odor at study; it was not found when the participants only studied odor names and were then tested with odors, suggesting that this effect is an episode-specific, perceptually driven phenomenon. Despite this difference, an overall TOT-attribution effect, whereby recognition ratings were higher during TOT states than during non-TOT states, was shown across conditions.     

Scene recognition without identification

Recognition without identification (RWI) is old-new discrimination among recognition test items that go unidentified. Recently, the effect has been shown in situations that require pre-experimental connections between unidentified studied items and their test cues, such as when the test cues are general knowledge questions and the unidentified studied items are their answers, or when the test cues are pictures of celebrities and the unidentified studied items are their names. In these cases, RWI demonstrates a peculiar relationship with tip-of-the-tongue (TOT) experiences: Participants give higher recognition ratings when in a TOT state than when not, even though studying an item does not increase the probability of a TOT state for that item. The present study extends these findings to the recognition of scene information. We demonstrate a scene RWI effect with scenes when scene names cannot be retrieved, and replicate the previously reported relationship between TOT states and RWI. In addition, we show that the relationship between RWI and reported TOT states also occurs between RWI and reported déjà vu states with the test scenes.     

Auditory recognition without identification

When visual recognition test items are unidentifiable--through fragmentation, for example--participants can discriminate between unidentifiable items that were presented recently and those that were not. The present study extends this recognition without identification phenomenon to the auditory modality. In several experiments, participants listened to words and were then presented with spoken recognition test items that were embedded in white noise. Participants attempted to identify each spoken word through the white noise, then rated the likelihood that the word was studied. Auditory recognition without identification was found: Participants discriminated between studied and unstudied words in the absence of an ability to identify them through white noise, even when the voice changed from male to female and when the study list was presented visually. The effect was also found when identification was hindered through the isolation of particular phonemes, suggesting that phoneme information may be present in memory traces for recently spoken words.     

Binary ROCs in perception and recognition memory are curved

In recognition memory, a classic finding is that receiver operating characteristics (ROCs) are curvilinear. This has been taken to support the fundamental assumptions of signal detection theory (SDT) over discrete-state models such as the double high-threshold model (2HTM), which predicts linear ROCs. Recently, however, Br?der and Schütz (2009) challenged this argument by noting that most of the data on which support for SDT is based have involved confidence ratings. The authors argued that certain types of rating scale usage may result in curved ROCs even if the generating process is thresholded in nature. From this point of view, only ROCs constructed via experimental bias manipulations are useful for discriminating between the models. Br?der and Schütz conducted a meta-analysis and new experiments that compared SDT and the 2HTM using binary (yes-no) ROCs and found that many of these functions were linear, supporting 2HTM over SDT. We examine all the data reported by Br?der and Schütz, noting important limitations in their methodology, analyses, and conclusions. We report a new meta-analysis and 2 new experiments to examine the issue more closely while avoiding the limitations of Br?der and Schütz's study. These new data indicate that binary ROCs are curved in recognition, consistent with previous findings in perception and reasoning. Our results support classic arguments in favor of SDT and indicate that curvature in ratings ROCs is not task specific. We recommend the ratings procedure and suggest that analyses based on threshold models be treated with caution.     

Receiver operating characteristics (ROCs) in recognition memory: a review

Receiver operating characteristic (ROC) analysis is being used increasingly to examine the memory processes underlying recognition memory. The authors discuss the methodological issues involved in conducting and analyzing ROC results, describe the various models that have been developed to account for these results, review the behavioral empirical literature, and assess the models in light of those results. The empirical literature includes studies of item recognition, relational recognition (e.g., source and associative tests), as well as exclusion and remember-know tasks. Nine empirical regularities are described, and a number of unresolved empirical issues are identified. The results indicate that several common classes of recognition models, such as pure threshold and pure signal detection models, are inadequate to account for recognition memory, whereas several hybrid models that incorporate a signal detection-based process and a threshold recollection or attention process are in better agreement with the results. The results indicate that there are at least 2 functionally distinct component/processes underlying recognition memory. In addition, the ROC results have various implications for how recognition memory performance should be measured.     

ROCs obtained with two signal intensities presented in random order,and a comparison between yes-no and rating ROCs

Two experiments are presented. The first experiment investigated the effect of mixing signals of two different intensities within the same blocks of trials upon receiver operating characteristics (ROCs) obtained with the rating procedure. The ROCs obtained when the signals of differing intensity were mixed in blocks of trials were found to be quite similar to those obtained when only one signal intensity was presented in any given block of trials. In the second experiment ROCs were determined by having subjects adopt different decision criteria on different blocks of trials in a yes-no experiment. The data points obtained in this experiment fell quite close to the ROCs obtained from the same subjects with the rating procedure in the first experiment.     

Forgetting in recognition memory with and without recollective experience

Retention interval was manipulated in two recognition-memory experiments in which subjects indicated when recognizing a word whether its recognition was accompanied by some recollective experience ("remember") or whether it was recognized on the basis of familiarity without any recollective experience ("know"). Experiment 1 showed that between 10 min and 1 week, "remember" responses declined sharply from an initially higher level, whereas "know" responses remained relatively unchanged. Experiment 2 showed that between 1 week and 6 months, both kinds of responses declined at a similar, gradual rate and that despite quite low levels of performance after 6 months, both kinds of responses still gave rise to accurate discrimination between target words and lures. These findings are discussed in relationship to current ideas about multiple memory systems and processing accounts of explicit and implicit measures of retention.     

Familiarity from orthographic information: Extensions of the recognition without identification effect

Two experiments were conducted to investigate the effect of letter location information in recognition memory judgments. The experiments used the recognition without identification paradigm (Peynircioglu, 1990), in which participants first attempt to identify the test item and then make a recognition decision as to whether or not the item was studied. In these studies, items that are not identified but that correspond to items that were presented are typically still rated as more likely to have been studied than those that were not presented. The present experiments demonstrated this finding with a variant of the conjunction lure paradigm. In Experiments 1 and 2, participants were tested with word fragments that were made from the letters of two words. When the letters were from studied items, fragments were rated higher than when the test items were derived from two unstudied items, or one studied item and one unstudied item, suggesting that recognition without identification is prone to the same types of errors as recognition with identification. Results are discussed in terms of familiarity effects in recognition memory.     

Concept identification with and without blank trials

The blank trials technique introduced by Levine (1966) has been of considerable importance in the study of concept identification and human discrimination learning, as it provides a means of identifying the hypotheses generating choice responses. However, this technique involves the interpolation between normal feedback trials of several trials during which no feedback concerning the correctness of a subject's responses is given.

An experiment was conducted to study the comparability of concept identification with and without blank trials. No differences in trials to criterion, number of errors, or in presolution latencies were observed. These results tend to justify inferences about normal concept identification from blank trial data, and they also have some implications concerning the role of memory in concept identification.     

Judgments for inaccessible targets: Comparing recognition without identification and the feeling of knowing

Both the recognition-without-identification (RWI) and feeling-of-knowing (FOK) paradigms attempt to tap participants?? sense about a target that is inaccessible. In the case of RWI, participants judge the likelihood that the inaccessible target was studied. In the case of FOKs, participants judge the likelihood that the inaccessible target will be recognized at a later point in time. The present study compared the two using a hybrid paradigm. The patterns of responding differed depending on whether the judgment was of the RWI type or the FOK type. For the former, ratings were significantly higher for studied than for unstudied inaccessible targets (the typical RWI effect). For the latter, ratings were significantly lower for studied than for unstudied inaccessible targets (a reversal of the usual RWI effect). Similarity of the targets and distractors diminished the usual RWI effect, but not its reversal in the FOK situation, suggesting that the bases of the two effects differ. A potential explanation is that when participants judge whether an inaccessible target was presented earlier, they are oriented toward relying on cue familiarity, which should be greater for cues of studied targets, whereas when they judge whether they will recognize an inaccessible target later on, they are oriented toward relying on the accessibility of information, which is greater in the unstudied condition, due to the lack of priming of the targets.     

Picture recognition without picture identification: a method for assessing the role of perceptual information in familiarity-based picture recognition

The present study examined the claim that unidentifiable test-pictures are processed and recognized on a perceptual, as opposed to a conceptual, level. Using an extension of the recognition without identification paradigm (e.g., Cleary, A. M. & Greene, R. L. (2000). Recognition without identification. Journal of Experimental Psychology: Learning, Memory, and Cognition, 26, 1063-1069; Peynircioglu, Z. F. (1990). A feeling-of-recognition without identification. Journal of Memory and Language, 29, 493-500), it was observed that when test-pictures were unidentifiable during a masked perceptual identification task, old-new discrimination occurred when the study-list consisted of pictures (Experiments 1-3), but not when the study-list consisted of picture names (Experiment 2) or when picture exemplars served as test-cues (Experiment 3). Results provide converging evidence that a study-test perceptual match is needed for the episodic recognition of unidentified test-pictures. Implications for the present paradigm as a tool for examining the role of perceptual information in recognition-familiarity are discussed.     

Text recall and text recognition with and without a title

Abstract: Recall and recognition memory for a text were investigated in two conditions: in one, subjects could understand the text well because they were presented with the title of the text prior to reading it; in the other, they could not understand the text so well because they were not presented with the title. Results showed that recall was better and sentence recognition more accurate when subjects had understood the text. A 1-h delay of the memory test after reading decreased recall performance, but not recognition performance. Different memory representations may have been operating when subjects had understood the text from when they had not.     

Recognition without identification

The ability of people to recognize words that they could not identify was examined. After studying a list of 15 words, participants completed a word fragment test consisting of 4-letter fragments of both studied and nonstudied words. Whether they were able to solve a particular fragment or not, participants then made an episodic recognition judgment. Even when participants were unable to solve a fragment, their recognition accuracy was significantly higher than chance. This effect was significant when list length was increased, when 2-letter fragments were used, when first letters were excluded from fragments, and when the letter casing and the presentation modality were changed from study to test. It also occurred when participants attempted to identify fragments at study and rated words at test. Recognition without identification is attributed to the use of orthographic information when determining the familiarity of a test item.     

Perceptual fluency and affect without recognition

A dichotic listening task was used to investigate the affect-without-recognition phenomenon. Subjects performed a distractor task by responding to the information presented in one ear while ignoring the target information presented in the other ear. The subjects' recognition of and affect toward the target information as well as toward foils was measured. The results offer evidence for the affect-without-recognition phenomenon. Furthermore, the data suggest that the subjects' affect toward the stimuli depended primarily on the extent to which the stimuli were perceived as familiar (i.e., subjective familiarity), and this perception was influenced by the ear in which the distractor or the target information was presented. These data are interpreted in terms of current models of recognition memory and hemispheric lateralization.     

False recognition and perception without awareness

Jacoby and Whitehouse (1989) demonstrated that the probability of calling new test words "old" (i.e., false recognition) is biased by context words. When context words were briefly exposed and subjects were not informed of their presence, new words were called "old" more often if the context and test words were identical than if the context and test words were different. When the context words were presented at longer exposure durations and subjects were informed of their presence, the opposite pattern of results occurred. In Experiment 1, we replicated the critical qualitative difference across conditions reported by Jacoby and Whitehouse. In addition, the combined results of Experiments 2 and 3 demonstrated that the exposure duration of the context words, and not the instructions to the subjects, is the primary factor determining which pattern of false recognition occurs. However, in contrast with the findings of Jacoby and Whitehouse, both patterns of false recognition were associated with significant recognition memory for the context words. The latter finding presents problems for any interpretation of false recognition, which implies that the briefly exposed context words are perceived without awareness.     

ROCs in Eyewitness Identification: Instructions versus Confidence Ratings

From the perspective of signal detection theory, different lineup instructions may induce different levels of response bias. If so, then collecting correct and false identification rates across different instructional conditions will trace out the receiver operating characteristic (ROC)—the same ROC that, theoretically, could also be traced out from a single instruction condition in which each eyewitness decision is accompanied by a confidence rating. We tested whether the two approaches do in fact yield the same ROC. Participants were assigned to a confidence rating condition or to an instructional biasing condition (liberal, neutral, unbiased, or conservative). After watching a video of a mock crime, participants were presented with instructions followed by a six‐person simultaneous photo lineup. The ROCs from both methods were similar, but they were not exactly the same. These findings have potentially important policy implications for how the legal system should go about controlling eyewitness response bias.Copyright © 2017 John Wiley & Sons, Ltd.     

False recognition without intentional learning

Asked to memorize a list of semantically related words, participants often falsely recall or recognize a highly related semantic associate that has not been presented (the critical lure). Does this false memory phenomenon depend on intentional word reading and learning? In Experiment 1, participants performed a color identification task on distractor words from typical false memory lists. In Experiment 2, participants read the same words. In both experiments, the primary task was followed by a surprise recognition test for actually presented and unpresented words, including the critical lures. False alarms to critical lures were robust and quite equivalent across the two experiments. These results are consistent with an activation/monitoring account of false memory, in which processing of semantic associates can evoke false memories even when that processing is incidental.     

Recognition without face identification

Recognition without identification is the finding that participants can recognize recognition test items as having been previously studied when the test items themselves are presented in such a way that their identification is hindered. The present study demonstrates this phenomenon in face recognition. Participants studied names of celebrities before receiving a recognition test containing pictures of celebrity faces. Half of the pictures were of celebrities whose names were studied; half were of celebrities whose names were not studied. Participants attempted to identify each face on the test and also rated the likelihood that each person's name was studied. Among the faces that went unidentified, ratings discriminated between celebrities whose names were studied and celebrities whose names were not studied. This recognition without face identification effect is dependent upon the sense of being in a tip-of-the-tongue state for a particular name. Theoretical implications of the results are discussed.