Semantic constraints and judged preference for interpretations of ambiguous sentences

It is proposed that the degree of sensibleness of sentences is determined by semantic constraints which may be more or less satisfied. Such continuous semantic constraints were examined in two experiments in which subjects judged the likelihood of obtaining each of the interpretations of ambiguous sentences. The sentences were factorially generated by independently varying the degree to which semantic constraints for each interpretation were satisfied. In one experiment, the semantic constraints were manipulated by varying critical words within the ambiguous sentence; in the other experiment, a preceding context sentence was used. The results of both experiments supported the hypotheses that the judged likelihood was a direct function of the relative sensibleness of the interpretations, that semantic constraints determined the degree of sensibleness of each interpretation, and that these semantic constraints are continuous restrictions which are independent of each other and stable from sentence to sentence in which they occur.     

The comprehension and verification of ambiguous sentences

When Ss are presented with an ambiguous sentence they tend to interpret it in only one way. If later events warrant, Ss can recover the other meaning, a process which takes time. These conclusions follow from the results of a study in which 40 undergraduate Ss verified whether or not pictures shown at the end of a sentence represented the meaning of the sentence. When ambiguous sentences were presented, the verification time (VT) was no slower than for unambiguous sentences if the picture represented the “expected” meaning (as determined on a pre-test) of the ambiguity. The VT to the picture representing the “unexpected” meaning of the ambiguity was longer than VT to corresponding control sentences.     

Developmental differences in the use of retrieval cues to describe episodic information in memory

In four experiments, this study examined some reasons why second and fourth grade children use cues relatively ineffectively to retrieve episodic information in memory. Retrieval success was conceptualized as using a cue to describe episodic information in memory. The experiments manipulated factors hypothesized to affect the discriminability and constructability of compatible encodings of context cue information at retrieval. In general, the effects were accomplished by varying the specificity of cue-target information at acquisition, and similar or different samplings of cue information alone at retrieval by means of orienting questions. Experiment 1 varied the encoding of item specific or categorical information. Experiment 2 varied the encoding of supercategorical or subcategorical information. Experiment 3 used two acquisition trials, crossing Categorical × Item Specific encoding and repeating identical encoding experiences. Experiment 4 varied Separate and Interactive Imagery encoding instructions. The results showed that problems of both discriminability and constructability contribute to developmental differences in the use of retrieval cues.     

Children's use of context and category cues to retrieve episodic information from memory

According to the encoding specificity hypothesis, a retrieval cue is effective to the extent that it is “compatible” with trace information in memory. The purpose of this study is to determine if the bases for establishing “compatibility” change with age. Adjective Noun-Noun (e.g., Bloody Axe-Sword) word triplets were presented at acquisition to second and fourth graders and college adults, and recall for the second noun (Sword) was tested at recall. The degree to which the retrieval cue information represented the acquisition encoding context was varied through the use of Adjective Noun, Noun, and Adjective context cues and cues representing the category name (e.g., weapon). In addition, the specificity of the acquisition encoding was manipulated. Either General (i.e., straight) or Distinctive (bloody) adjectives modified the nouns; encoding was constrained by relational or highly specific orienting questions, or was unconstrained (No Orient); and the questions were congruent or incongruent. The most striking results were that the second graders made effective use only of the Adjective Noun cues that most adequately represented the encoding context, and only in the most specified event situations (i.e., distinctive adjectives/specific congruent orienting questions).     

Processing resource capacity and the comprehension of garden path sentences

Three experiments explored the relationship between verbal working memory capacity and the comprehension of garden path sentences. In Experiment 1, subjects with high, medium, and low working memory spans made acceptability judgments about garden path and control sentences under whole sentence and rapid serial visual presentation (RSVP) conditions. There were no significant differences between subjects with different working memory spans in the comprehension of garden path sentences in either condition. In Experiments 2A and 2B, subjects with high and low working memory spans were tested on the same materials at three RSVP rates. There were no significant differences between subjects with different working memory spans in the magnitude of the effect of garden path sentences at any presentation rate. The results suggest that working memory capacity, as measured by the Daneman and Carpenter (1980) reading span task, is not a major determinant of individual differences in the processing of garden path sentences.     

Children's comprehension of sentences with focus particles

We report three studies investigating children's and adults' comprehension of sentences containing the focus particle only. In Experiments 1 and 2, four groups of participants (6-7 years, 8-10 years, 11-12 years and adult) compared sentences with only in different syntactic positions against pictures that matched or mismatched events described by the sentence. Contrary to previous findings (Crain, S., Ni, W., & Conway, L. (1994). Learning, parsing and modularity. In C. Clifton, L. Frazier, & K. Rayner (Eds.), Perspectives on sentence processing. Hillsdale, NJ: Lawrence Erlbaum; Philip, W., & Lynch, E. (1999). Felicity, relevance, and acquisition of the grammar of every and only. In S. C. Howell, S. A. Fish, & T. Keith-Lucas (Eds.), Proceedings of the 24th annual Boston University conference on language development. Somerville, MA: Cascadilla Press) we found that young children predominantly made errors by failing to process contrast information rather than errors in which they failed to use syntactic information to restrict the scope of the particle. Experiment 3 replicated these findings with pre-schoolers.     

Centering on figurative features during the comprehension of sentences describing scenes

Summary Subjects were asked to read sentences which described scenes containing objects. In the scene described in each sentence, a specific part of a particular object was necessarily implied as having an important role. The object was named but none of its parts were. The assumption was that the subjects, while processing the sentence and immediately afterward, would cognitively center on the important part, as a function of the context created by the sentence. Immediately after reading the sentence, the subjects were probed with a picture of either the important part, or of an unimportant part of the object. Judgments of the compatibility of this picture probe with the sentence were faster for pictures of important parts than for pictures of other parts. This was taken as supporting the hypothesis of cognitive centration. In a second experiment, in which words were used as probes instead of pictures, a purely verbal process to account for the results was ruled out. In a third experiment, subjects were given instructions to intentionally form visual images of the scenes described by the sentences. In this case, overall response times to the picture probes were shorter than in the absence of such instructions, but this decrease was greater for pictures of unimportant parts. This finding was interpreted as showing that imagery instructions increase the rate of activation of features to varying degrees as a function of the previous level of activation.     

Repetition and comprehension of spoken sentences by reading-disabled children

The language problems of reading-disabled elementary school children are not confined to written language alone. These children often exhibit problems of ordered recall of verbal materials that are equally severe whether the materials are presented in printed or in spoken form. Sentences that pose problems of pronoun reference might be expected to place a special burden on short-term memory because close grammatical relationships obtain between words that are distant from one another. With this logic in mind, third-grade children with specific reading disability and classmates matched for age and IQ were tested on five sentence types, each of which poses a problem in assigning pronoun reference. On one occasion the children were tested for comprehension of the sentences by a forced-choice picture verification task. On a later occasion they received the same sentences as a repetition test. Good and poor readers differed significantly in immediate recall of the reflexive sentences, but not in comprehension of them as assessed by picture choice. It was suggested that the pictures provided cues which lightened the memory load, a possibility that could explain why the poor readers were not demonstrably inferior in comprehension of the sentences even though they made significantly more errors than the good readers in recalling them.     

Perspective-taking and comprehension of passive sentences by Japanese-speaking children

This study demonstrates that children's difficulties in the interpretation of passives are attributed to their perspective-taking ability. Thirty-six Japanese preschool children participated in act-out sentence comprehension tasks. They were asked to manipulate two toy animals to demonstrate the meaning of two types of stimulus sentences: Type I had the child's toy, whose reference involved the child's actual name (e.g., Jun-kun no neko Jun's cat) encoded as grammatical subject, while Type II had the child's toy encoded as non-subject. Since passive structures take the perspective of the patient-denoting subject NP, it is assumed that only Type I passives have the perspective that matches that of the child.The results show that children's performance on passives was significantly better in Type I than in Type II sentences. But this difference was not observed for active sentences. For those who showed (nearly) perfect performance on active sentences, only Type I passives were equally well understood. These results strongly suggest that perspective-taking difficulties mask children's true competence on passives and that even 6-year-olds may not yet have attained the full perspective-taking ability required for comprehension of passive sentences.     

Semantic distinctions and memory for complex sentences

This investigation studied what people remember in recalling complex sentences, whether it is certain semantic distinctions or merely transformational markers. After short intervals 24 subjects tried to recall sentences of six kinds which formed paraphrase sets: S₁ before S₂, S₁ and then S₂, After S₁ S₂, S₂ after S₁, S₂ but first S₁, and Before S₂ S₁. (S₁ and S₂ denote first and second clauses in temporal, not linguistic, order.) Subjects remembered the underlying sense of sentences with S₁-S₂ clause ordering better than those with S₂-S₁ clause ordering, regardless of transformational complexity. Subjects also showed a response bias, hence better verbatim recall, for sentences with subordinate clause second and for sentences with S₁-S₂ clause ordering. Sentence confusions indicated that subjects remembered three semantic distinctions: the temporal order, order of mention, and main-subordinate relation of the two described events. A theory of memory for marked and unmarked semantic distinctions was used to account for the results.     

Children's comprehension of complex sentences

Four tasks were given to children from 4–12 to test their comprehension of complex sentences containing main verbs taking underlying sentences as their complements (Sally knew that she was early). In an imperatives task, very young children interpreted only the complement verb and ignored the complex verb. In a short-term memory task, sentences with two negations usually lost the second not in recall. In direct questioning and anomaly-detection tasks, children tended to make pragmatic inferences and excessively depend on knowledge about the world, as opposed to linguistic information. Overall results showed that even sixth graders had not yet attained adult-level comprehension of complex sentences.     

Semantic and syntactic factors in the perception of rapidly presented sentences

An important controversy in psycholinguistics has been the nature of the initial hypothesis in sentence processing. This problem has been directly addressed with the Rapid Serial Visual Presentation (RSVP) technique, in which words of a sentence are presented one at a time at tachistoscopic rates. The results of this research (Forster and Ryder, 1971) have provided evidence against Bever's (1970) thesis that most normal perceptual processing of sentences is probably carried out with little regard to actual sequence or structure. However, since the number of words seen is a result of presentation speed as well as psycholinguistic processing, this result could be an artifact of presentation rate. A slower or faster rate could facilitate different processing strategies and perhaps suggest a different nature of the initial hypothesis. Thus, the present study is a conceptual replication of Forster and Ryder (1971), at different presentation rates. While significant effects for syntactic structure were obtained only at the slower presentation rate, results for semantics were significant at both slow and fast presentation speeds. Thus, insofar as sentence perception with the RSVP technique reflects the nature of the initial hypothesis, it is suggested that the hypothesis is semantic.     

Semantic operations deficits in sentence comprehension

Summary The ability of aphasic patients to comprehend sentences involving the combination of two linguistic operations was tested in a sentence/picture matching task. Sentences included affirmative, negative, uncompared and comparative types. Aphasic patients had significantly greater difficulty in understanding negative-comparative constructions than sentence types involving only a single operation. Comparison of the responses of the aphasic patients with data obtained in a perceptual comparison task revealed that a subgroup of patients had marked difficulty in integrating information in both tasks. The results are interpreted as an indication that some aphasic patients are especially disturbed in their ability to combine several operations in the construction of semantic representations for sentences. It is further argued that this deficit may extend to an inability to integrate information in the perceptual/spatial domain, as suggested by Luria in his discussion of the syndrome of semantic aphasia.The research reported here was supported by NIH research grant 14099 to The Johns Hopkins University. We would like to thank Dr. Annamaria Basili, Chief, Department of Audiology and Speech Pathology, Fort Howard Veterans Administration Medical Center, for permission to test the patients. We are indebted to the entire staff of that department for their continued cooperation, and for their many useful comments on the research reported. We also thank Michael Giordano, Conrad Selnick, and Susan Baisley for their assistance in data analysis. A version of this paper was presented at the annual meeting of B.A.B.B.L.E., Niagara Falls, Canada, March, 1979     

The role of prior context in the comprehension of abstract and concrete sentences

Summary In two experiments the hypothesis was tested that abstract sentences become as easy to understand as concrete sentences when given appropriate prior context. Paragraph contexts and sentences followed by a comprehension question were presented in a speeded reading task. The results showed that the abstract sentences remained significantly more difficult to process than the concrete sentences in both experiments. The hypothesis that the concreteness effect is a function of differential context availability was therefore not supported. It was proposed that lexical differences and/or differences in ease of propositional integration may underlie the effect.     

Phonological cues to open- and closed-class words in the processing of spoken sentences

Evidence is presented that (a) the open and the closed word classes in English have different phonological characteristics, (b) the phonological dimension on which they differ is one to which listeners are highly sensitive, and (c) spoken open- and closed-class words produce different patterns of results in some auditory recognition tasks. What implications might link these findings? Two recent lines of evidence from disparate paradigms—the learning of an artificial language, and natural and experimentally induced misperception of juncture—are summarized, both of which suggest that listeners are sensitive to the phonological reflections of open- vs. closed-class word status. Although these correlates cannot be strictly necessary for efficient processing, if they are present listeners exploit them in making word class assignments. That such a use of phonological information is of value to listeners could be indirect evidence that open- vs. closed-class words undergo different processing operations.     

Relational processing and working memory capacity in comprehension of relative clause sentences

Previous research has indicated that the cognitive load imposed by tasks in various content domains increases with the complexity of the relational information processed. Sentence comprehension entails processing noun-verb relations to determine who did what to whom. The difficulty of object-extracted relative clause sentences might stem from the complex noun-verb relations they entail. Across three studies, participants read 16 types of object- and subject-extracted relative clause sentences at their own pace and then responded to a comprehension question for each sentence. Relational processing was assessed using a premise integration task or a Latin square task. These tasks predicted comprehension of object-relatives before and after controlling for subject-relatives. Working memory (WM) capacity was assessed using reading span or forward and backward digit span tests. WM tasks predicted comprehension of object-relatives before but not after controlling for subject-relatives. Comprehension of object-relatives relied more heavily on a domain-general capacity to process complex relations than on WM capacity.     

Children's comprehension of semantic constraints on temporal prepositions

Children's comprehension of the semantic rules for temporal prepositions was investigated. The temporal prepositions werein, on, andat. Lech's (1969) semantic analysis was used as the framework for the study. The contextual property [(x)]→TIM[PERI] with its related constraints indicates the ill-formedness of phrases like^* in noon,^* on January and^* at Saturday. Correct usage of these prepositions is based on the implicit distinction between time with or without duration (period versus moment). Comprehension differences among the prepositions, based on semantic differences were hypothesized, as well as developmental differences across age levels. Thirty-five children at each of three levels (kindergarten, grades 2, and 4) in Experiment 1, and 24 grade 4 children in Experiment 2, judged the appropriateness of sentences containing temporal prepositions and attempted to revise the ill-formed sentences. Significant developmental differences were observed. Kindergarten children could not discriminate between well- and ill-formed sentences; second grade children could discriminate but could not identify the reason for their discrimination, nor could they revise the ill-formed sentences. Fourth grade children could discriminate and identify or revise the ill-formedness. Ability to revise the prepositions was found to be related to cognitive developmental level. None of the children in either experiment were able to articulate the periodicity-moment temporal distinction which provides the basis for the semantic constraints. The awareness of semantic rules for temporal prepositions may be relatively late in developing, perhaps between the ages of 8 and 10 years. An advanced awareness of these rules may develop considerably later.     

Depth of comprehension,effective elaboration,and memory for sentences

It was hypothesized that depth of comprehension is a function of the complexity of the meaning components of a sentence that are activated during initial encoding. In four experiments, subjects were presented sentences containing either transitive causative verbs (e.g., “John opened the door”) or their intransitive noncausative counterparts (e.g., “The door opened”) and were required to produce a continuation to each sentence. Based on the above hypothesis, sentences for which the continuations induced causative interpretations should be remembered better than sentences for which noncausitive interpretations were induced. The results confirmed this hypothesis, and they are considered in relation to depth of comprehension, effective elaboration, and the role of inferences in memory for sentences.     

Cognitive processes,school achievement,and comprehension of ambiguous sentences

Previous research has identified three distinct forms of linguistic ambiguity: lexical, surface structural, and deep structural. Cummins and Das (1978) studied these forms of ambiguity in the context of Das, Kirby and Jarman's (1979) model of simultaneous and successive processing, and demonstrated that comprehension of lexical ambiguity depended upon simultaneous processing, while that of surface and deep structural ambiguity depended upon successive processing. The present study investigated the relationship between these cognitive and linguistic processes in a group of older children. The subjects' level of English achievement was also considered. The results showed that comprehension of all three forms of ambiguity was strongly related to level of English achievement, though deep structure ambiguities best descriminated the English achievement groups. Results also showed that perception of all types of ambiguity was related to both simultaneous and successive processing. Subjects with high successive processing scores had an additional advantage in perceiving deep structure ambiguities. These results suggest the need for an elaboration of the Cummins and Das cognitive process model of liguistic processes, demonstrating that a variety of task variables can alter the cognitive processes required in performance of linguistic tasks.This study was supported by an Australian Research Grants Committee grant to J. B. Biggs and the author.