The Impact of Embedded Story Structures versus Sequential Story Structures on Critical Thinking of Iranian Intermediate EFL Learners

Confirming the constructive effects of reading comprehension on critical thinking, this paper attempted to investigate the impact of story structures on critical thinking of Iranian EFL learners. In doing so, the researcher utilized a quasi– experimental design with 60 intermediate students who were divided into two embedded story structures and sequential story structures groups (experimental groups). After taking PET, a critical thinking questionnaire was employed as a pre-test. The two groups received 16 sessions of treatment. All participants received similar amount of instruction but one group was given embedded short stories and the other group sequential short stories. To compare the two groups, they were received the parallel critical thinking questionnaire as a post-test. The two null hypotheses in this study were rejected due to different performance of the two groups. Statistical results did not support the superiority of neither structures. Therefore, the researcher was not able to suggest which structure caused a better or higher impact on critical thinking. However, the findings reveal that teaching story structures in EFL context can develop critical thinking of intermediate EFL learners. The study have some implications for test-designers, teachers, and students.


Introduction
Findings have mentioned that learners cannot receive certain information passively without any changes in learning environments that activate their thinking skills.Accordingly, schools have better to teach students how to learn and think for themselves.Richard Paul & Linda Elder (2008) assert that it is the nature of human to think.But much of our thinking is not complete, it is partial, one-sided, uninformed, and distorted.To improve the quality of our life we need to improve our thinking skills.In brief, thinking is a necessary part of our social and intellectual lives.As Paul (2004) claims, there is a close relationship between reading comprehension and critical thinking.Those who can improve their reading skill, have a reflective mind and those with higher reading ability, can think more critically and creatively.Therefore, critical thinking is important in education; learners who are able to think about reasons in logical manner are successful.Many researchers believe that there is a necessity for everyone to become a better critical thinker.They all come to an agreement that enriched critical thinking has a significant effect among all different classes of the society and social groups.Therefore, for all students and teachers it is necessary to learn critical thinking for their own educational development and understand its role in their future life.Consequently, reading is one of the most significant skills in our daily life.It helps people to learn, acquire knowledge, and experience everywhere at any time.The importance of reading is under consideration in second or foreign language.The role of text structure in clarifying meaning of text is significant.Knowledge of narratives structure thus can be beneficial in furnishing literary reading skills.Until recently, language teachers and learners did not show much interest in using stories to improve critical thinking and those who were interested did not use them seriously.Majority of students used these instruments as a means of entertainment and did not pay attention to stories as a helpful way for improving their thinking.Some researchers find a number of effective and useful points with regard to the use of stories in improving critical thinking; in contrast, others show that using stories do not affect critical thinking.While several studies have been conducted to investigate the effects of embedded and sequential story structures, relatively few have been done on the effects of these story structures on critical thinking and there is not any research about the effects of embedded and Flourishing Creativity & Literacy sequential story structures on critical thinking of learners and the role of regular practices have been neglected for a long time.Accordingly, most of teachers have failed to teach students to think critically.Al-Dersi (2013) states that the use of short-stories can be the best method to achieve this goal.All stories contain elements that can determine structure and each is present in every story, there is generally one that the author cares about most dominates the others.All the story events and states were virtually identical in the two structures; however, the sequencing of the events and states was manipulated to produce sequential causal chain and embedded causal network structures.Riedl & Young (2006) maintains that sequential narrative, unlike the embedded narrative, is a form of narrative in which events are sequenced from beginning to ending.As narrative form is an intrinsic tendency of human mind to construct meaning, it is significant in people lives.Our mind prefers to process whatever we experience in a narrative form rather than as discrete facts in logical relationships (Pearson, 2008).Based on the above-mentioned points, this study would aim to show that the embedded story structures and sequential story structures have significant effect on critical thinking of Iranian EFL learners.To this end, this study attempts to shed light on the effects of these story structures on critical thinking of intermediate EFL learners and try to improve critical thinking of EFL learners in a different way.It also intends to signify how short story structures guide the process of understanding texts.In fact, the proposed study was done to improve critical thinking of students and in this way help them to increase stress-management skills and help them to reflect and learn effectively.In the following, we represent the research questions that led this study.Q1: Do embedded story structures have any significant effect on critical thinking of EFL learners?Q2: Do sequential story structures have any significant effect on critical thinking of EFL learners?2. Literature review According to Kabilan (2000), students can improve their thinking skills through different teaching methods and materials.For example reading text books which activate learners' thinking, help them to become critical thinkers.Grabe (1991) affirms that there are some skills in critical thinking that can be applied to reading comprehension such as analysis, deduction, and evaluation.Reading comprehension is one of the most significant components in English language learning for all learners because it the root of knowledge in education (Alverman & Earle, 2003).Reading proficiency is the constructing meaning and thinking before, during and after reading by mixing reader's background knowledge with the existing information by the writer in the context (Sweet & Snow, 2003).Rauch and Weinstein (1968) prove that reading is a complicated skill.It has intellectual outcomes that spread beyond its instant task of conveying meaning from a specific passage.Furthermore, these outcomes are naturally mutual and exponential.The reading comprehension process happens when the reader comprehends the information in a text and deduces it appropriately (Ahmadi & Hairul, 2012).Reading is the mixture of perception and comprehension between the readers and the setting (Eskey, 2005).Farhady (2005) states that people usually read because they want to gain information about a specific subject.Studying the purposes and effects of reading, Grellet (1996) has separated reading into two key parts: reading for pleasure or reading for information.Rosenblatt (1938) states that many people read anything written to gather information.According to Grellet (1996), people read books to do something with the data they gather from the reading part.Considering reading comprehension as an important skill in second language syllabus, Barnett (1989) defines numerous explanations for its importance: It could be continued when learners improve language learning; it continues as a significant objective in lots of programs; and it helps the improvement of learning skills.Storytelling and story reading also have the power to combine the arts and education and persuade students to connect them with their learning.Mottley and Telfer (1997) do a research to clarify what teachers' experiences with story reading, both as readers and as tellers, has been.The researchers come to an agreement that the most of teachers could remember events with storytelling, signifying that these events have a long-lasting influence on them.Barthes and Duisit (1975) claim that there are a lot of types of narrative in the world.Narrative exists in myth, legend, tales, short stories, history, tragedy, drama, comedy, pantomime, paintings, movies, local news, and conversation.Additionally, with these different types, it always exists in all places, in all cultures; certainly narrative begins with the history of human being; there is certainly not and there has never been any place, any societies without narrative; all human groups with all classes, have their own stories, and generally those stories are liked by men with another and even opposite cultural backgrounds.Embedded stories set up the essential requirements for a second episode to happen, but does not immediately cause the second to occur.Episode embedding happens when a second episode initiates before a first episode has finished.A second episode can be embedded in a first episode in one of three settings: the beginning, the development, or the ending.The character tries to achieve a goal, fails because one or more requirements have not been met, and must create a different plan to reach the goal.
The sequential story could be defined as an ordered network of story categories and logical relations linking the categories.Categories show the different kinds of information that recur in a lot of stories.The logical relations joining the categories show the degree to which information in one category effects the happenings of events in following categories.The primary separation in the story structure contains two parts: the setting category and the episode.The episode is the key higher order unit of analysis in a story and comprises specific kinds of information and work for a different function in the schema (Stein and Trabasso, 1981).Story structure straight instruction consists of improving the learners' abilities to differentiate the elements of narrative text and use these elements to expand their understanding of the story (Beck, 1984).In spite of all attempts and prices of foreign language teaching in Iran, the problem seems to be in educational system, in that teachers try to clarify what to think instead of how to think.Currently critical thinking has become one of the catchwords.Its modern origins can be traced back to the early 20 th century which educator John Dewey presented the concept of reflective thinking.A lot of researchers have defined critical thinking throughout the years.Its roots are in psychology and philosophy from the time of Socrates.Bailin (1998) classifies two types of approaches to critical thinking: the normative (philosophical) approach that emphases on critical practices and the descriptive (psychological) approach that emphases on abilities, procedures and techniques.
In spite of all opposing thoughts and opinions on teaching critical thinking skills, everyone come to an agreement that thinking critically is the most important subject in education (Reed, 1998).Teaching critical thinking in a strong sense is one of the important issues in the foundation for critical thinking (Paul and Elder, 2008).The matter of integrating critical thinking skills in teaching has increased numerous inconsistent thoughts about whether critical thinking can be trained or not.

Participants
A total of 60 Iranian female EFL learners at the intermediate level of English proficiency, studying at Karaj Simin language institute in Iran took part in this study in October and November 2015.The study was carried out for 32 sessions (each group had 16 sessions).All the candidates were homogenized for their level of language proficiency with the PET reading task.

Instruments
The following data collection instruments were applied in this study.A Preliminary English Test (PET, reading part), was utilized to find out the homogeneity of the groups.Preliminary (PET) qualification indicates that learners have learnt the basics of English and now have practical language skills for routine lives' use.Preliminary was reintroduced in 1980 and offered to candidates throughout the 1980s in limited entry form.It appeared as a good exam in the 1990s, getting updates in 1994.In 1999, the exam was reviewed with participants and the modern version was presented in March 2004.Four skills of reading, writing, listening, and speaking are included in PET.But in this study candidates are tested for their ability to understand the meaning and structure of reading passages at sentential and discourse level.The Reading paper has five parts and 35 questions.Parts 1 to 5 concentrate on reading skills, comprising basic knowledge of vocabulary and grammar.The exam comprises answering multiple choice questions, choosing descriptions which match different texts, and recognizing true or false information.Candidates are supposed to read and understand different varieties of short texts and longer scientific texts.Text sources might consist of symbols, brochures, newspapers, magazines and messages such as notes, emails, cards and postcards.To accomplish the task, Watson Glaser Critical Thinking Test was utilized as both pre-test and post-test.The test included 85 multiple choice items and participants should correctly answer questions within 40 minutes.The Watson Glaser Critical Thinking Test is an assessment instrument considered as a way to measure an individual's critical thinking skills.It is one of the strongest predictors of job and educational success.Reliability of this questionnaire was measured via Cronbach's Alpha because the formula also represents internal consistency of the test which partially reflects its validity.The value of Cronbach's Alpha was .687,which was considered a relatively acceptable value; therefore, it was concluded that the utilized critical thinking questionnaire enjoys satisfactory level of reliability and internal consistency.In addition, in the task of facilitating students' thinking skill, one group was given embedded short stories and the other group was given sequential short stories.The teaching materials chosen by the researcher included twelve intermediate short stories (six embedded short stories and six sequential short stories), each of which was presented to the participants at the end of the class time (the last half hour).The selection of those stories was based on the subsequent three main conditions recommended by Nuttall (1996): • The stories were supposed to draw the participants' attention as the issues relate to real circumstances and applicable to the participants' lives.
• The length of the stories was considered appropriate for the prearranged period of time for each one, avoiding the students from being bored.• The stories were considered to be at an ideal level of language difficulty in terms of linguistic features and the number of new words.

Procedure
As mentioned, 60 intermediate EFL learners participated in this study.Participants were assigned into two experimental groups.All students participated in a modified version of PET in order to make sure there was no meaningful difference between the two groups before receiving the treatment and to make sure that the participants were at the same level of language proficiency.At the first session, the critical thinking questionnaire was given to students as a pre-test.Embedded and sequential story structures were described by the teacher and participants were informed that they were going to learn story structures.The researcher explained the importance of using short stories in improving critical thinking.The students were ask one question: How do you think embedded or (in another group) sequential story structures might help learners improve their critical thinking?Goals and objectives were written on the board to encourage students' participation as collaborators in the learning process.During this stage, students practiced and paid attention to the sequence of stories for answering the questions.Lastly, researcher provided feedback to the students' performance.Students had to select a topic followed by generating summaries with sequential or embedded structures.After teaching this strategy in the classroom, the teacher conducted a parallel critical thinking to see whether this was an effective intervention.The allocated time for the completion of the post-test was 40 minutes.After that, the researcher scored them according the tests' answer keys.All activities were performed individually.

Design
As a random sampling method was not conducted by the researcher, the design of the research was quasi-experimental.

Results and Discussion
The quantitative data was collected through critical thinking questionnaire as a pre-test and post-test and analyzed statistically; percentages and graphs were made to compare these two groups.It lasted for two months.Application of parametric statistical analyses is acceptable if a number of assumptions are recognized.Besides the assumption of normality of the analyzed data which is tested through a one sample Kolmogorov-Smirnov test in the present study, it is required to verify homogeneity of variances of the data sets.Indeed, for parametric sample-sample comparisons to be valid, it is to be statistically verified that the difference between the variances of the samples from which the data is collected is not statistically significant.This, in turn, indicates that the members of the samples have been selected from the same population.In this study, the assumption of homogeneity of variances is tested through Levene's Test for Equality of Variances which is clear in the t-tables.The results of the one sample Kolmogorov-Smirnov test of normality of the sets of scores from the PET, pre-test and post-test of critical thinking of the embedded story structures group and the sequential story structures group reveals that for none of the sets of scores the recommended asymptotic level of significance is smaller than the standard .05level of significance.Consequently, it is resolved that all of the data sets are normal and application of parametric tests is justified.
Since the calculated level of significance for Levene's measure of equality of variances is .967,which is larger than the .05standard, homogeneity of variances of the two sets of scores being analyzed is justified and t is used without any modification.On the other hand, SPSS suggested .971,which is more than .05,as the two-tailed level of significance of the independent samples t (-.037); accordingly, it is verified that the two groups are not statistically different in terms of their participants' knowledge of English.
The value of Cronbach's Alpha is .687,which is considered a relatively acceptable value; therefore, it is determined that the applied critical thinking questionnaire has a satisfactory level of reliability and internal consistency.Table 2. demonstrates that the difference between the pre-test and post-test mean scores of the embedded story structures group is statistically significant since the proposed level of significance of the t, which is .000, is less than the standard level of significance (i.e..05).Subsequently, it is resolved that the treatment given in this experimental group has successfully improved the participants' critical thinking ability.The paired-samples t (i.e.-3.655) which signifies the difference between the mean of the pre-test and post-test of critical thinking of the sequential story structures group is statistically significant because, as stated in Table 3., the calculated level of significance of t, which is .001, is less than the .05standard level of significance.Therefore, it is determined that critical thinking ability of the members of the sequential story structures group has improved significantly from the pre-test to the post-test.In other words, the treatment given in this group has enhanced the participants' critical thinking ability.Just like the case with the pre-test of critical thinking of the two groups, the difference between performance of the participants of the embedded story structures group and that of the participants of the sequential story structures group is not statistically significant.This means that the difference between the mean scores is not large enough to be considered meaningful.Therefore, it is determined that the effects caused by the two different types of treatment is statistically similar.The two treatments are effective; yet, they are similar and none of them is more effective than the other.This is exactly what the weak and inconsiderable effect size signified by the eta squared (.032) reported in Table 6.

Conclusion and Implications
The purpose of this study was to examine the impact of embedded story structures versus sequential story structures on critical thinking of Iranian EFL learners.To pursue this objective the researcher offered two null hypotheses: H01: Embedded story structures do not have any significant effect on EFL learners' critical thinking.
H02: Sequential story structures do not have any significant effect on EFL learners' critical thinking.
Having verified normality of the collected data and homogeneity of the samples in terms of the subjects' knowledge of English, in order to make it easier for the researcher to prove the proposed null hypotheses in this Chapter, significance of the difference between results of the pre-test and post-test of critical thinking of the subjects from the embedded story structures group and the sequential story structures group put to a statistical test.
It is resolved that the effects caused by the two different types of treatment were statistically similar.The two treatments were effective; but, they were similar and none of them was more favorable than the other.
Based on the results, it became obvious that the treatment given in the embedded story structures group has formed a significant effect.Therefore, embedded story structures have significant effect on EFL learners' critical thinking and it is possible to reject the first null hypothesis: "Embedded story structures do not have any significant effect on EFL learners' critical thinking." According to the results, it concluded that the treatment given in the sequential story structures group has significantly affected the subjects' critical thinking ability.Thus, the researcher is to reject the first null hypothesis: "Sequential story structures do not have any significant effect on EFL learners' critical thinking." This study concluded that learning short story structures are effective and can support the EFL learners improve their critical thinking.
This study has practical implications for language teaching in EFL context.Two embedded and sequential story structures are approved to be effective tools in improvement of critical thinking of EFL learners and results suggested that despite previous assumptions, none of them is more favorable than the other.Beyer (1987) believes that thinking skills should be taught in order to be improved.Teaching students to think should be main concern of our schools today.In any thinking process we employ critical and creative thinking.The term critical thinking is common in education, psychology, and philosophy.Developing critical thinking skills is an old idea.Osborne (1932) declared that one of the main purposes in education is development of thought power.Dressel and Mayhew (1954) claimed that teachers and educational settings are responsible for teaching students to think critically and creatively.

Table 1 .
Descriptive statistics of the PET, pre-test and post-test of critical thinking of the two groups

Table 2 .
Paired-samples t test of the pretest and post-test of critical thinking of the embedded story structures group

Table 3 .
Paired-samples t test of the pre-test and post-test of critical thinking of the sequential story structures group

Table 4 .
verifies homogeneity of variances of the two sets of scores since the level of significance of Levene's estimate of equality of variances(.588) is more than .05.Furthermore, it is demonstrated that the difference between the mean of the pre-test of critical thinking of the embedded story structures group and that of the sequential story structures group is not significant as the suggested two-tailed level of significance, which is .629, is larger than the standard level of significance.This means that although the two groups performed differently in the pre-test of critical thinking, this difference is not statistically meaningful.

Table 5 .
Independent-samples t test of the post-test of critical thinking of the two experimental groups In table 5., since homogeneity of variances of the critical thinking post-test scores is established and the calculated level of significance of Levene's estimate of equality of variances (i.e..991) is larger than the standard level of significance, the degree of freedom of t does not necessitate any adjustment and the level of significance of t (.172) is reported from the first row of the table.

Table 6 .
Effect size of the treatments provided in the two experimental groups