We know, for example, that texts must have a certain structure that depends on factors quite different from those required in the structure of a single sentence. Some of those factors are described in terms of cohesion, or the ties and connections that exist within texts. A number of those types of cohesive ties can be identified in the following paragraph.

My father once bought a Lincoln convertible. He did it by saving every penny he could. That car would be worth a fortune nowadays. However, he sold it to help pay for my college education. Sometimes I think I’d rather have the convertible.

There are connections present here in the use of words to maintain reference to the same people and things throughout: father – he – he – he; my – my – I; Lincoln – it. There are connections between phrases such as: a Lincoln convertible – that car – the convertible. There are more general connections created by a number of terms that share a common element of meaning, such as “money” (bought – saving – penny – worth a fortune – sold – pay) and “time” (once – nowadays – sometimes). There is also a connector (However) that marks the relationship of what follows to what went before. The verb tenses in the first four sentences are all in the past, creating a connection between those events, and a different time is indicated by the present tense of the final sentence.

Analysis of these cohesive ties within a text gives us some insight into how writers structure what they want to say. An appropriate number of cohesive ties may be a crucial factor in our judgments on whether something is well written or not. It has also been noted that the conventions of cohesive structure differ from one language to the next and may be one of the sources of difficulty encountered in translating texts.

However, by itself, cohesion would not be sufficient to enable us to make sense of what we read. It is quite easy to create a highly cohesive text that has a lot of connections between the sentences, but is very difficult to interpret. Note that the following text has connections such as Lincoln – the car, red – that color, her – she, letters – a letter, and so on.

My father bought a Lincoln convertible. The car driven by the police was red. That color doesn’t suit her. She consists of three letters. However, a letter isn’t as fast as a telephone call.

It becomes clear from this type of example that the “connectedness” we experience in our interpretation of normal texts is not simply based on connections between Discourse analysis 143 the words. There must be some other factor that leads us to distinguish connected texts that make sense from those that do not. This factor is usually described as “coherence.”