exploring new applications of the keyword method to acquire english vocabulary

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Language Learning 46:3, September 1996, pp. 379-395 Exploring New Applications of the Keyword Method to Acquire English Vocabulary Enrique Avila Mark Sadoski Universidad de los Andes, Venezuela Texas A&M University Previous research on L2 vocabulary learned by the keyword method has primarily involved the use of English keywords to learn the vocabulary of other languages. Our study used Spanish keywords to acquire English vocabu- lary. Sixty-three fifth-grade limited English proficiency students learned the definitions of 10 English words either by the keyword method or by control instructions empha- sizing direct translation and memory. We administered cued-recall and sentence-completion tasks either immedi- ately or after a 1-week delay in a between-subjects experi- mental design. Results showed that the keyword method produced superior recall and comprehension both immedi- ately and after 1 week. Results further demonstrated that the keyword method is readily adaptable to actual ESL classrooms. The mastery of vocabulary is an essential component of second language (L2) acquisition. Vocabulary is also of prime concern in L2 settings because it plays a dominant role in class- Enrique Avila, Department of Modern Languages. Correspondence concerning this article should be addressed to Mark Sadoski, Department of Educational Curriculum and Instruction, Texas A&M University, College Station, Texas 77843-4232. Internet: [email protected] 379

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Language Learning 46:3, September 1996, pp. 379-395

Exploring New Applications of the Keyword Method to Acquire English Vocabulary

Enrique Avila Mark Sadoski Universidad de los Andes, Venezuela Texas A&M University

Previous research on L2 vocabulary learned by the keyword method has primarily involved the use of English keywords to learn the vocabulary of other languages. Our study used Spanish keywords to acquire English vocabu- lary. Sixty-three fifth-grade limited English proficiency students learned the definitions of 10 English words either by the keyword method or by control instructions empha- sizing direct translation and memory. We administered cued-recall and sentence-completion tasks either immedi- ately or after a 1-week delay in a between-subjects experi- mental design. Results showed that the keyword method produced superior recall and comprehension both immedi- ately and after 1 week. Results further demonstrated that the keyword method is readily adaptable to actual ESL classrooms.

The mastery of vocabulary is a n essential component of second language (L2) acquisition. Vocabulary is also of prime concern in L2 settings because it plays a dominant role in class-

Enrique Avila, Department of Modern Languages. Correspondence concerning this article should be addressed to Mark

Sadoski, Department of Educational Curriculum and Instruction, Texas A&M University, College Station, Texas 77843-4232. Internet: [email protected]

379

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room success (Krashen & Terrell, 1983). However, “whether, and how best, to teach vocabulary has long been a topic of controversy” (Levin, Levin, Glasman, & Nordwall, 1992, p. 156).

Twenty years ago, Atkinson (1975) developed a mnemonic technique based on imagery-the keyword method-for learning foreign language (FL) vocabulary. The strategy involves two stages. First, the FL word is associated with a familiar concrete word (the keyword) based on acoustic similarities. The next stage is the production of an imaginal link between the target word and the keyword. For instance, a student could learn the translation of the Spanish word carta, meaning (postal) letter, using the English word cart as the keyword and generating a visual image of a giant postal letter inside a shopping cart. Recalling the image reminds the learner of the word carta as well as the meaning, postal letter.

Mnemonic devices such as the keyword method have been used for many centuries (Thompson, 1987). Today, the keyword method is one of the most extensively researched mnemonic strategies. It has proven effective in improving both immediate and delayed recall of LB/FL vocabulary (e.g., Atkinson & Raugh, 1975; McDaniel, Pressley, & Dunay, 1987; Pressley, Levin, & Delaney, 1982; Pressley, Levin, & McDaniel, 1987). Nonetheless, Thompson argued that not enough is known about “the optimal conditions for their use in L2 learning. . . . However, what is known so far seems to generally support the notion that mnemonics, particularly the imagery keyword technique, enable learners to memorize vocabulary more effectively” (p. 48).

Several researchers have advanced theoretical rationales for the use of the keyword method. Taking a dual-coding theory perspective (Paivio, 197 1/1979, 1986), Paivio and Desrochers (1979) argued that in the case of the keyword method mental imagery provides a meaningful link between each mnemonic pegword and recall. Levin (1989) argued that the keyword method is mnemonic-based in that it relies on the recoding, relating, and retrieving principles of effective associative mnemonic devices. Pressley, Levin, Kuiper, Bryant, and Michener (1982) and Pressley

Avila and Sadoski 381

et al. (1987) claimed that the keyword method provides linkages from the vocabulary word to a meaningful definition and therefore produces enhanced associative recall of definitions. That is, when cued with the vocabulary words, the learner has a direct mne- monic route, via the keyword interaction, to the appropriate meanings. Similarly, Cohen (1987) claimed that mnemonic aids are most beneficial in successfully guiding students to remember L2 vocabulary. Cohen maintained that one of the best ways of improving performance in learning new words is by using mne- monic links.

Empirical research has produced findings about the effec- tiveness of the keyword method for different age groups and for immediate versus delayed recall. Pressley (1977) and Pressley and Levin (1978) adapted Atkinson’s (1975) keyword method to determine whether children could benefit from the strategy. Their results were consistent with Atkinson’s conclusion about the effectiveness of the keyword method for vocabulary learning. However, they found that, for young children (ages 6-8) to derive maximum benefit from the keyword method, it was necessary to provide them with actual line drawings during the imagery link stage. Pressley, Samuel, Hershey, Bishop, and Dickinson (1981) obtained similar results with 3- to 5-year-old children. Similarly, Levin et al. (1984) suggested that young children seem to have difficulties generating interactive images for themselves. These findings are consistent with Rohwer’s (1973) developmental elabo- ration theory, which states that with increasing age, children can better apply imagery-based elaboration strategies. Younger chil- dren may need pictures for maximum effect.

Other experimental results suggested that even 1 l-year- olds are capable of using the keyword method (Merry, 1980). These findings indicated that the keyword method improved both the immediate and delayed recall of 1 l-year-old students’ learn- ing of French vocabulary.

However, other studies have found effects of the keyword method only for immediate recall. In a recent study, Wang, Thomas, and Ouelette (1992) compared the retention rates of

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college students for L2 vocabulary words that were learned using either the keyword method or rote learning. They conducted four experiments in which the retention interval (immediate vs. de- layed) was treated as a between-subjects factor. Use of the keyword method substantially increased learning speed and im- mediate recall of French nouns and their English equivalents, as compared to rote learning. However, their findings indicated that long-term forgetting was greater for learners using the keyword method than for learners engaged in rote rehearsal.

Two studies by Wang and Thomas (1992), using between- subjects designs, compared the effects of the keyword method and rote learning on the long-term recall of English translations of Chinese ideographs. The researchers claimed that the results obtained in both studies replicated earlier research demonstrat- ing the effectiveness of the keyword method for immediate recall. However, in no instance did they find that the use of the keyword method conferred any advantage for delayed recall.

The above findings suggest that the use of the keyword method in various forms facilitates the immediate recall of vo- cabulary from a number of languages. That is, students receiving instructions in the keyword method typically recall substantially more definitions soon after learning, compared to students as- signed to use other strategies or left to their own devices. Results for delayed recall are mixed. The findings further suggest that younger children can benefit most from the keyword method when pictures are provided for them. However, our review of literature revealed no published investigations of schoolchildren using key- words from other languages to acquire English vocabulary. (But see Brown & Perry, 1991, where the keyword method was used with Arabic keywords for learning English vocabulary with Ara- bic college students.) We therefore explored the use of a modified version of the keyword method with schoolchildren: using Span- ish keywords to acquire English vocabulary. This approach offered the advantage of using keywords that were already estab- lished in L1 rather than using keywords from L2 that may have been less familiar (Cummins, 1981).

Avila and Sadoski 383

In addition, we addressed certain other issues related to the practical use of the keyword method. One issue was whether this method could be effectively applied in actual classroom contexts (cf. Brown & Perry, 1991). As Levin (1985) pointed out, the terms group administration and classroom implementation are not synonymous. He suggested more evaluation of the keyword method in actual classroom settings beyond the laboratory. The present study took place in actual fifth-grade classrooms using certified bilingual teachers.

Another issue concerns retention interval. There is much evidence that the keyword method produces benefits in immedi- ate recall, as measured by definition recall (Levin, 1989). Theo- retically, imagery-based techniques such as the keyword method reduce forgetting over time as well (Paivio, 1971/1979,1986). The long-term benefits of the keyword method have been demon- strated empirically with children (Levin et al., 1984; McDaniel et al., 1987; Merry, 1980). However, Wang and Thomas (1992) claimed that measures of long-term retention may have been confounded in earlier studies by repeated measures testing (e.g., Groninger, 1971; Ott, Buttler, Blake, & Ball, 1973; Pressley & Levin, 1985; Rosenheck, Levin, & Levin, 1989). Wang and Thomas suggested that a between-subjects design would be desirable to avoid the confound established by testing the same people repeat- edly. The present study investigated both immediate and delayed retention intervals, using a between-subjects design.

Another issue is the common criticism ofthe keyword method, refuted by its advocates (e.g., Pressley et al., 1987; Pressley, Levin, & Miller, 1981), that recall of vocabulary definitions is enhanced at the expense of comprehension and usage (e.g., Higbee, 1978; Nagy & Herman, 1987). The present study investigated comprehension and usage as well as recall of definitions.

Specifically, this study addressed the following research questions:

1. To what extent does the use of the keyword method, Spanish version, by limited English proficiency (LEP) Hispanic fifth-graders improve their recall of new English vocabulary

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either immediately or after a delayed retention interval of one week?

2. Are LEP Hispanic fifth-graders who use the keyword method to learn vocabulary definitions able to appropriately complete sentences using target vocabulary items, either immedi- ately or after a delayed retention interval of one week?

Method

Participants

The initial pool of participants were 93 low-achieving, dis- advantaged, fifth-grade LEP Hispanic students from an urban school district in Texas. Prior to the study, the students scored at or below the 23rd percentile on the Science Research Associates Survey of Basic Skills and scored at or below the 5th instructional level, out of 8, on the Idea Proficiency Test, a state-approved oral language proficiency test in English. Although the majority of students (82) were of Mexican descent, there were also 11 stu- dents who came from other Latin American countries, including Colombia (11, El Salvador (4), Guatemala (11, Honduras (21, and Nicaragua (3). The mean age of the group was 11.2 (SD=.97). We included only students who were present for all instructional sessions and testing sessions in the final sample. The final sample size was 63.

Materials

We used 13 English words as the to-be-learned vocabulary items. Three of them served as practice items. The remaining experimental words consisted of 8 low-frequency words, as mea- sured by Paivio, Yuille, and Madigan’s (1968) norms, and 2 obscure words, as defined in McDaniel and Pressley (1984). In an informal survey, a group of experienced ESL teachers judged that the English words were words that would be unknown to LEP fifth-graders, although the Spanish equivalents would be well known.

Avila and Sadoski 385

We constructed four booklets, one practice booklet and one study booklet, for each learning condition. The practice booklet for the keyword method condition was three pages long and provided interactive pictures of the 3 Spanish keywords and the Spanish equivalents of the English words. The pictures were created by the researchers and drawn by an artist. The English word, the Spanish keyword, and the Spanish meaning of the English word were printed at the bottom of each page below the picture. The practice booklet for the control condition provided only the English words and their Spanish counterparts in the center of each page. An example of a word as presented to the experimental group appears in Figure 1; an example of the same word as presented to the control group in Figure 2.

HAIR PIN (arpa) HORQUILLA

Figure 1. Example of a word as presented to the experimental (keyword method) group.

HAIR PIN HORQUILLA

Figure 2. Example of a word as presented to the control group.

386 Language Learning Vol. 46, No. 3

Test Instruments

We devised a cued recall test and a sentence completion test. The cued recall test required students to write the Spanish equivalents in a blank after each of the 10 English words. We provided no Spanish words. The sentence completion test re- quired them to fill in a blank in each of 10 sentences by choosing the word that best fit the context. The sentences were in English and devised so that each word would fit only one context correctly. We provided the English vocabulary words in a list on the same page as the sentences. For example, one sentence read, “She likes cooking chili using the old iron .” The correct word, skillet, was available in a list after the sentences.

Procedures

Eight certified bilingual/ESL teachers and their bilingual aides gave instruction. The use of Spanish was encouraged throughout the duration of the study, following Cummins’ (1981) suggestion that students who learn academic concepts and lit- eracy skills in their L1 can more readily transfer those skills to an L2 because their knowledge is grounded in the language they comprehend.

We randomly assigned the students to eight classes in near- equal numbers. The mean number of students per class was 11.6. We randomly assigned classes to either the keyword method condition or the control condition, and randomly assigned teach- ers to classes.

We gave the teachers and their aides two training sessions, based on procedures in Pressley and Levin (1978) and Kasper (1993). In the first teacher training session, we explained the logic of the keyword method. We gave them instruction and practice in the component steps of the keyword method, and asked them to bring any questions to the second session.

In the second session, we discussed the questions and reac- tions of the teachers and their aides. We provided additional practice in the use of the keyword method. Then we assigned

Avila and Sadoski 387

teachers to experimental or control conditions and warned them against disclosing any kind of information that could contaminate the study. We especially warned control group teachers to avoid any mention of the keyword method or similar strategy. We provided a printed set ofprocedures for using the keyword method to the teachers in the experimental group. We assigned a set of procedures using only translation to the teachers in the control group.

On the first day of the experiment, the teachers gave the students practice on the 3 practice items. In the experimental group, the teachers explained the logic of the keyword method. They provided interactive pictures for the practice items and emphasized the importance of remembering the interactive pic- tures. Teachers presented control group students the material as follows: “The English word [English word] means [Spanish defini- tion]”. The teachers then asked the control group students to try their best to remember the words.

On the second day of the experiment, the teachers presented students in both groups with the 10 experimental words. As they presented each item, the instructors followed the respective procedure from the practice session.

On the third day of the experiment, both groups reviewed the 10 words with the teacher, briefly repeating the procedures of the second session. Then 15 minutes were allotted for studying the words independently. Following the study interval, the teachers gave the students in the “immediate” condition the cued recall test for the Spanish equivalents of the English words. They advised the students to use their previously instructed strategies. These students then had their cued recall tests collected and received the sentence completion test. For the groups in the “delayed condi- tion, the instructors gave both tests exactly one week later in the same manner.

After the experiment, we informally interviewed a group of 16 students who had the best performance. This group included four students from each experimental condition (keyword imme- diate and delayed; control immediate and delayed). We asked the

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students to share the vocabulary learning strategies employed during the study as well as their reactions to the method they used. The interview lasted approximately 10 minutes per group; it was conducted in Spanish.

Results

We performed separate 2x2 [(learning condition: keyword or control) x (retention interval: immediate or delayed)] analyses of variance for the cued recall data and the sentence completion data. Because of unequal cell sizes, we employed the general linear model (GLM) procedure (Hatch & Lazarton, 1991).

Cued Recall

Means and standard deviations for the cued recall test appear in Table 1. The GLM analysis revealed a significant main effect for learning condition, F(1, 59)=19.94, p<.OOOl. Students using the keyword method outperformed students in the control condition. The GLM analysis revealed a significant main effect for retention interval, F(1,59)=30.49,p<.OOOl. Immediate recall was greater than delayed recall. The interaction was not significant.

We computed effect sizes for the differences in cued recall between the keyword and control groups for both the immediate and delayed retention intervals. The effect size for immediate recall was .59 standard deviation units and the effect size for

Table 1 Cued Recall Performance

Learning Condition Keyword Control

Retention Interval M SD n M SD n

Immediate 8.56 1.82 18 6.78 3.04 18 Delaved 6.50 3.03 12 2.33 1.84 15

Note. Maximum Score=lO.

Avila and Sadoski 389

Table 2 Sentence Completion Performance

Learning Condition Keyword Control

Retention Interval M SD n M SD n

Immediate 9.22 1.31 18 6.72 2.97 18 Delaved 5.75 2.49 12 3.60 2.87 15 Note. Maximum Score=lO.

delayed recall was 2.27 standard deviation units. These effect sizes are, respectively, moderate and very large (Cohen, 1988).

Sentence Completion

Means and standard deviations for the sentence completion test are in Table 2. The GLM analysis revealed a significant main effect for learning condition, F(1, 59)=14.09, pc.0004. Students using the keyword method outperformed students in the control condition. The GLM analysis revealed a significant main effect for retention interval, F(1, 59b29.31, p < . O O O l . Immediate perfor- mance was better than delayed performance. The interaction was not significant.

We computed effect sizes for the differences in sentence completion performance between the keyword and control groups for both the immediate and delayed retention intervals. The effect size for immediate sentence completion was .84 standard devia- tion units and the effect size for delayed recall was .75 standard deviation units. These effect sizes are, respectively, large and moderate (Cohen, 1988).

Informal Interviews

We asked the students to share the strategies they used and their reaction to them. Students in the control groups reported using a rote repetition strategy most often. That is, they repeated

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the English target item and its Spanish counterpart over and over. However, nearly every student in a control condition reported using more than one strategy. Of these other strategies, they most frequently reported noticing that a target item and its counterpart began with the same letter. For example, the target item, skillet, and a Spanish equivalent, sarten, begin with the same letter. They also frequently mentioned looking words up in a dictionary for a complete definition. The control group reported few other strategies as frequently. No student in a control condition reported using the keyword method or any similar strategy.

On the other hand, virtually all the keyword method stu- dents reported having used the strategy assigned to them. They reported both being successful at executing the keyword method to learn the new English vocabulary and finding it enjoyable. Representative comments were: “The method helped me, and I learned new words” and “I liked it a lot, it was fun.” Some of these students mentioned that the keyword method helped them main- tain a high level of interest in the hard task of learning new vocabulary. Most of them had something positive to say about the method.

Discussion

Previous research on immediate and long-term retention of vocabulary learned by the keyword method has primarily in- volved the use of English keywords to learn the vocabulary of languages other than English. Our study was designed to assess the utility of the keyword method using Spanish keywords to acquire English vocabulary by at-risk Hispanic fifth graders.

We addressed two major questions in the study. First, to what extent did the use of the keyword method, Spanish version, by limited English proficiency (LEP) Hispanic fifth-graders im- prove their recall of new English vocabulary either immediately or after one week? Results regarding cued recall support those of previous studies in which the keyword method improved stu-

Avila and Sadoski 391

dents’ memory for definitions. Students using the keyword method were able to recall approximately 25% more definitions immediately, and nearly three times as many definitions after one

quite well over time. That this occurred in a between-subjects design counters Wang and Thomas’ (1992) contention that the advantage of the keyword method for long-term retention found in previous studies may have been due to the use of repeated measures testing. However, Wang and Thomas used different participants (college students) and control condition instructions (rote rehearsal) than we did.

The second research question asked whether LEP Hispanic fifth-graders who used the keyword method to learn vocabulary definitions were able to appropriately complete sentences using target vocabulary items, either immediately or after one week. The results showed that keyword students were superior to control students for sentence completion, both immediately and after one week. In fact, performance on the immediate sentence completion test was even higher than on the immediate cued recall test. These findings counter the argument that the superi- ority of the keyword method is obtained at the expense of the performance in comprehension and usage (e.g., Higbee, 1978; Nagy & Herman, 1987).

Our study also demonstrated that using the keyword method is practical in public school classroom contexts. The students in these classes were LEP fifth-graders in need of strategies for English vocabulary acquisition. They were successfully taught the keyword method by classroom teachers who had undergone two brief teacher training sessions in the technique. Interviews with students suggested that they found the technique not only effective but enjoyable. Therefore, the classroom application of the keyword method to ESL at-risk middle-grade students is supported. However, researchers need more classroom assess- ments of the keyword method before making any permanent conclusions.

This study supports theories that include the use of imagery

week. Thus, they retained the English vocabulary definitions

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elaboration strategies in learning verbal material (e.g., Paivio, 1971/1979,1986; Rohwer, 1973; Sadoski & Paivio, 1994; Sadoski, Paivio, & Goetz, 1991). The use of imagery was superior to interverbal translation between languages and rote repetition strategies for learning vocabulary items. An interesting direction for further research would be to determine if LEP fifth-grade students could generate their own mental images for use with the keyword method or whether they require pictures, as appears to be the case with younger children. Another useful extension of this research would be to test the English version of the keyword method against the Spanish version.

Finally, we should mention some limitations. The words we selected for this study were concrete nouns that could be repre- sented by pictures. Presumably, learners would require other methods to learn more abstract words. Also, our participants learned only one definition of each word, whereas many words have several. Besides, many English nouns are very similar to their Spanish counterparts, making the keyword strategy or other strategies potentially less necessary or effective. However, for many words in English and in other languages, keyword learning may be an effective technique.

Revised version accepted 18 October 1995

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