Term Paper, 2008, 9 Pages
Does the Garden-Path Theory sufficiently explain how humans comprehend sentences?
Comprehending language - either spoken or written - seemingly belongs to the simplest tasks humans are faced with in day to day life. Intelligence and education hardly play a role when it comes to understanding speech. It is an action that can be performed more or less equally by the vast majority of humans, even those with mental disabilities. More than that humans do it effortlessly and unconsciously.
But how do we do it? What is it exactly that happens in our minds when we hear or read a sentence? Many psycholinguists claim that the task of understanding language involves building a grammatical structure in your mind. This process is referred to as syntactic analysis or sentence parsing. It includes assigning a word class to each word, combining them into word groups and then finding syntactic relationships between those word groups. These steps should correspond with rules of grammar and the message intended by the sender.
The procedure of understanding a sentence can be broken down into the following parts: 1 auditory and visual word recognition ( phonological/orthographical level) lexical and morphological processes ( morphological level) parsing ( syntactic level) conceptual interpretation ( semantic level) referential process ( pragmatic level)
The tasks listed above are, as empirical data suggests, usually undergone more or less simultaneously and exchange information in both top-down and bottom-up directions. What does that mean? The top-down approach assumes that listeners impose their expectations on the message they receive and will get confused should those not be fulfilled. Bottom-up on the other hand means that the addressee will first assemble the information given to him and then put it in the right order. There is some evidence that the top-down approach plays a big role. It becomes quite clear when we take into account that messages can often be misunderstood. As Tom Bever from the Columbia University in New York pointed out, the addressee tends to jump to conclusions when receiving messages. He outlines four basic assumptions that English-speakers make when they try to understand a sentence: 2
“Every sentence consists of one or more sentoids or sentence-like chunks, and each sentoid normally includes a non-phrase followed by a verb, optionally followed by another nounphrase.”
The principle underlying that assumption is that the receiver of a message will try to divide it into noun phrase - verb sequences. It is called the canonical sentoid strategy as NP-V-NP is the standard form of English sentences. That the above assumption seems to be true becomes obvious when people are presented with a sentence like “Lloyd kicked the ball kicked it.”. Usually they will try to force an NP-V structure on it interpreting it as “Lloyd kicked the ball (and then) kicked it (again).”. In the rarest cases the actual meaning of “Lloyd (who was) kicked the ball kicked it.” will be grasped.
“In a noun phrase-verb-noun phrase sequence, the first noun is usually the actor and the second the object.”
1 Friederici, Angela D. 1999. Language Comprehension: A Biological Perspective, 2 nd edition. Berlin, Heidelberg: Springer Verlag: P. 212
2 Aitchison, Jean. 2008. The Articulate Mammal: An introduction to psycholinguistics, 5 th edition. London, New York: Routledge: P. 214
The corresponding strategy would be to interpret NP-V-NP sequences as actor-action-object unless there is a strong clue not to do so. There have been famous experiments by Dan Slobin showing that sentences not having the actor first take longer to comprehend. “When a complex sentence is composed of a main clause and one or more subordinate clauses, the main clause usually comes first.”
So the strategy to this assumption would be interpreting the first clause as the main clause if there is no indication to do otherwise. A good example would be the sentence “The elephant squeezed into the telephone booth collapsed.”. Because of the above assumption a reader of that sentence would possibly assume that “The elephant squeezed...” was the beginning of a main clause at-least until coming to the word collapsed. “Sentences usually make sense.”
The underlying strategy here, i.e. using one's knowledge of the world to pick the best interpretation, seems to be the strongest one. It is what allows us to even understand syntactically incomplete or false utterances. Experiments showed that subject remembered sentences that were ungrammatical but appeared to make sense better than sentences that were grammatically right but semantically dubious.
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