Influence Interpersonal Communication and Leadership on Work Discipline and Their Impact on Teacher Performance of

: This study aims to determine the effect of Interpersonal Communication, Leadership and Discipline on the employment of teacher performance at SMK Negeri 8 Palembang. In this study, the population is 60 people as sample tests as samples. Sampling was conducted using the saturated sampling technique sampling is done on the whole of the population. The results of this study are Interpersonal Communication's positive significant effect on employment Discipline Master, Interpersonal Communications positive significant effect on Teacher Performance. Leadership has a positive and significant effect on employment Teacher Discipline, leadership and significant positive effect on teachers' performance. Teachers' work discipline has a positive and significant effect on the performance of teachers of SMK Negeri 8 Palembang, and work discipline is mediating variables Interpersonal Communication relation to the performance and discipline of work is mediating variables Leadership relation to performance. Discipline variable labor has a value r-square of 0.996, meaning that the variable Disciplinary work can be explained by the Interpersonal Communication and Leadership construct 99.6%. Variable Performance r-square value of 0.255 means that the variable performance can be explained by the construct of Interpersonal Communication, Leadership, and the Discipline of the work amounted to 25.5% Based on these conclusions, if the principal of SMK Negeri 8 Palembang intends to increase Interpersonal Communications to improve the performance of teachers, it is necessary to work through increased Discipline Discipline of work is mediating variables Leadership relationship to performance. So based on these conclusions, if the principal of SMK Negeri 8 Palembang. intends to enhance its leadership to increase performance, it is necessary to work through increased Discipline of the three variables used to see the effect on the performance, ie Interpersonal Communication, Leadership, and the Discipline of the work, all of which have a positive effect on performance. But of these three variables, can be prioritized improvement of Leadership. Because of 9 indicators of Leadership., One indicator has a value of loading factor is quite high, namely more than 0.9.


INTRODUCTION
The development of science and technology accelerates modernization in all fields.Various developments in science and technology are getting stronger in line with the demands of reform and globalization.For this reason, human resources are needed who have competence, master science and technology and are able to compete to face challenges in the era of globalization.The development of an increasingly modern era also demands an increase in education that is appropriate and in line with the functions and goals of national education.
The principal as the highest leader in an educational institution unit has the duties and responsibilities as managers and controllers of school organizational decisions.In addition to being a leader who is responsible for educational leadership, as a manager, as well as a decision maker , the principal is the first party to determine the educational dynamics of the school, both in terms of progress and setbacks.In that case, the principal is an educational staff who has a significant role and function on the quality of education, including in this case the quality of education output , managerial education, satisfaction with services to educational stakeholders .In the process of interaction between the principal and the teacher, supporting components are needed which are contained in the communication process, such as source/communicator, encoding , message, channel, receiver, decoding , response, interference, and communication context.
In addition to leadership , in terms of work discipline is a factor that greatly affects teacher performance.Work discipline is a mental attitude that is reflected in the actions

R E S E A R C H A R T I C L E
Sekolah Tinggi Ilmu Administrasi (STIA) Bala Putra Dewa *) corresponding author Yuniarti, S. Pd, MM Email: edu.buletin@gmail.comNusantara Journal of Behavioral and Social Science, 1(4), 2022, -106 UKInstitute or behavior of a person, community group, in the form of obedience to the rules, norms that apply in society.There are several approaches to improve work discipline, namely preventive discipline, which is an action taken to encourage employees to comply with standards and regulations so that there are no violations, or are preventative without being forced which will ultimately create self-discipline.
Second, work discipline is an effort to regulate time in work that is carried out regularly by developing and following existing work rules.To create work discipline for teachers, supervision is needed, both supervision from direct superiors and supervision from oneself.Starting from the opinion above, if the teacher has high discipline, it means that he has good morals to carry out his work which also results in higher performance.
The process of teaching and learning activities (KBM) at SMK Negeri 8 Palembang which is in two places and at two times, namely in the new building located on Jalan Panca Usaha 5 Ulu Palembang for morning and afternoon and the other in the SMPN 7 Palembang building, Jalan A. Yani Lorong Manggis Palembang for afternoon classes which makes communication often difficult to run well.Likewise, the Principal as a leader is very difficult to control the KBM which is in two places at once, so that the discipline of the teachers will be weak without Supervision and Communication.
Teacher performance is felt to be not optimal, this can be seen from the teacher 's performance SMK Negeri 8 Palembang is seen as less than optimal teacher performance in completing assignments at school , there is still a lack of communication that occurs between principals and teachers, not optimal yet the leadership of the principal who is still lacking in involving teacher participation, not optimal work discipline in terms of attendance and punctuality of working hours often late or even absent., and the available resources are not sufficient so that it has an impact on improving the quality of performance in schools and decreasing teacher work productivity so that it has an impact on school performance From the explanation above, to find out the influence of Interpersonal Communication and Leadership on work discipline and its impact on performance, it can be done through research with the title "The Influence of Interpersonal Communication and Leadership on Work Discipline and its Impact on Teacher Performance at SMK Negeri 8 Palembang ".

LITERATURE REVIEW Teacher Performance
Teacher performance is a teacher's ability to apply his abilities in accordance with the teaching profession he has, whether the results achieved are maximal or not.

Interpersonal Communication
Interpersonal communication is an effort to convey information to send messages to others in determining opinions, expressing feelings, facts, thoughts to others either verbally/directly, in writing or using sophisticated communication tools to be able to influence others in receiving the information so that they can make good decisions to superiors, subordinates and colleagues in an agency or organization.Operationally, interpersonal communication is manifested in formal forms, namely vertical, horizontal and diagonal working relationships and informal forms , namely social interactions between teachers during teaching hours and outside teaching hours.

Leadership
Leadership is the ability, nature, character or activity possessed by every leader to move or influence the behavior of others by providing guidance or direction, providing supervision or examples to others so that they want to work well, be loyal and responsible for what is done so that goals can be achieved.Leadership in this study is measured by coaching, example, giving orders, communication so as to motivate subordinates in such a way through various activities carried out so that they want to work well and are willing to work together to achieve a goal that has been set by an organization.

Work Discipline
Discipline is the process or result of directing, controlling desires, impulses, interests for the sake of an ideal or achieving more effective action.Operationally, teacher work discipline is manifested in the form of obeying the rules, obeying the rules, obeying all work guidelines, meeting work standards and maintaining work standards consistently.

Population, Sample and Sampling Technique
The population in this study were all teachers of SMK Negeri 8 Palembang while the sample was part of the population that would be the object of research.In this study the population is 60 people.Sampling in this study used the Saturated Sample technique, namely sampling was carried out as a whole from the total population.In this study by considering the number of samples of 60 people, the authors took the entire population, namely as many as 60 people as a sample of the research sample.

Conceptual and Operational Definitions of Variables
According to the problem and research objectives, this research variable consists of: 1.The dependent variable is Performance Y (endogenous variable) 2. Independent variable (exogenous variable) which includes Interpersonal Communication (X 1), leadership (X 2 ) and work discipline (X 3 ) .

Research Instruments
To obtain data related to Interpersonal Communication, Leadership and Work Discipline on Performance, an instrument in the form of a questionnaire is used with measurements using a Likert scale which has five levels which is an ordinal type scale with an estimated value of the answer to each question posed to the respondent.By using 4 instruments, namely Leadership, Motivation and Career Development instruments and Performance instruments which are then developed into several questions or parameters to be measured.(Strongly Agree (SS) = 5, Agree (S) = 4, Disagree ( KS ) = 3, Disagree (TS) = 2 and Strongly Disagree (STS) = 1.Furthermore, the questionnaires will be tested validation and reliability:

Validity test
Validity is a measure that shows the levels of validity or validity of an instrument.Suharsimi, 1998 argues that an instrument is said to be valid if it can reveal data from the variables studied appropriately.The high and low validity of the instrument indicates the extent to which the data collected does not deviate from the description of the variable in question.This study uses Confirmatory Factor Analysis (CFA), with a Partial Least Square (PLS) approach.
The validity scale is processed in two stages: convergent validation analysis and discriminant validation analysis.Convergent validation was tested using the three criteria suggested by Fornel and Larck (1981), namely: 1.All item loading factors must be significant and have a value > 0.70 2. combined reliability (c) > 0.80 .
3. average variance extracted (AVE) > 0.50 or square root of AVE must be > 0.71

Reliability Test
The reliability test in this study is intended to determine the extent to which the measurement results remain consistent, if the measurement is carried out twice on the same symptoms.This study conducted a reliability test by calculating the Cronbach Alpha of each item in a variable.
The instrument used in the variable is said to be reliable if it has a Cronbach Alpha > 0.60 (Nunnaly, 1978).
The reliability test was only carried out on all questions that passed the validity test.To determine the reliability of the instrument, Cronbach's Alpha technique was used .This technique was chosen because it is a fairly perfect reliability consistency testing technique.Cronbach's Alpha value closer to 1 indicates that the instrument has a higher reliability.Cronbach's value between 0.80 to 1.0 is said to be of good reliability, the value of 0.60 to 0.79 is categorized as acceptable reliability, and less than 0.60 categorized as not good (now, 1992).

Data analysis technique
Data analysis was carried out with the help of the Partial Least Square (PLS) version 3.0 program.

RESULTS AND DISCUSSIONS Data Analysis with Smart-PLS
There are several stages that must be carried out in research with data processing techniques using the Partial Least Square (PLS) -based SEM method, namely:

Measurement of Variable Model / Outer Model
The measurement of the variable model is a step to see the validity and reliability of the indicators in the model.A model is declared valid if it has a loading factor above 0.5, or in other words a loading factor lower than 0.5 has low convergent validity, so a loading factor lower than 0.5 must be dropped from the model, while the test reliability is seen from composite reliability , if the value is more than 0.7 then it indicates a satisfactory value, and further strengthened by looking at Cronbah's alpha , it is recommended to have a value above 0.6.The following is an image of the model after the calculation via Smart-PLS:  The picture above shows that all loading factors have a value of more than 0.5, so it can be said that meet convergent validity.In detail the value of the loading factor can be seen in the table below:  Table 4.8 shows that the composite reliability value of all variables is above 0.7 and Cronbah's alpha value of all variables is above 0.6, so that all research variables have been shown to be fit gauges, this means that all question items that will be used for measuring variable is reliable.

Structural Measurement / Inner Model
Measurement of Structure / Inner Model is used to see the relationship between variables, through the bootstrapping process, T-Statistic test parameters are obtained to predict the relationship between variables, then the structural model is evaluated by looking at the percentage of variance explained by the dependent variable R-square.The R-square value for the dependent variable is as table 4.9.The higher the r-square value, the greater the ability of the independent variable to explain the dependent variable so that the better the structural equation.

Hypothesis testing
Hypothesis testing in PLS is based on the value contained in the structural model analysis, the path coefficient significance level is obtained from the t-statistic value and the standardized path coefficient value.The limit of the value of hypothesis testing is the t-value of the factor loadings (factor loadings) which is greater than the critical value (1.96 ) .
The results of hypothesis testing through the inner model can be seen in the path coefficient as table 4.10 and the results of each hypothesis can be explained as follows: The first hypothesis: Interpersonal communication has a significant positive effect on teacher work discipline at SMK Negeri 8 Palembang, this is indicated by the t statistic of 86.579 1.96.
The second hypothesis: Leadership has a significant positive effect on teacher work discipline at SMK Negeri 8 Palembang, this is indicated by the t statistic of 3.304 1.96.
The third hypothesis: Interpersonal Communication of Teachers at SMK Negeri 8 Palembang has a positive and significant effect on teacher performance at SMK Negeri 8 Palembang, this is indicated by the t-statistic of 2.584≥ 1.96.
Fourth hypothesis: Leadership has a positive and significant effect on teacher performance at SMK Negeri 8 Palembang, this is indicated by the t statistic of 4.826 1.96.
Fifth hypothesis: Teacher work discipline at SMK Negeri 8 Palembang.positive and significant effect on teacher performance at SMK Negeri 8 Palembang, this is indicated by the t statistic of 5.063 1.96.2012) The purpose of this study is to analyze and prove the effect of work motivation and leadership on work discipline and employee performance, as well as to analyze and prove the effect of work discipline on employee performance.This is the more effective the leadership style used by the leader in leading and providing direction, the more disciplined the employees of the Human Resources Division (HR) at PT. PLN (Persero) APD Semarang will also increase.
third hypothesis test show that: Teacher Interpersonal Communication has a positive and significant effect on teacher performance at SMK Negeri 8 Palembang.This is in accordance with the theory that refers to In an organization or the world of work, communication plays an important role.It is said so because the success of interacting in the organization is through communication.If communication can run effectively, then information in organizational dynamics will run smoothly so that it can accelerate the process of completing a job.On the other hand, if communication is hampered, the flow of information will stagnate, and the result will certainly make a job too late to be completed.
Interpersonal communication between all elements in a job will greatly affect the performance of all elements in the work environment.The relationship between leaders and other employees in the organization sometimes experiences problems and sometimes things are not harmonious at work.For this reason, an organization needs to learn and understand interpersonal communication in order to avoid communication problems fourth hypothesis test indicate that leadership has a significant effect on teacher performance at SMK Negeri 8 Palembang, this means that apart from being a leader, on the other hand the principal is also a manager, namely carrying out tasks in planning, making decisions, controlling and assessing results., convey and explain orders, resolve conflicts that arise, and foster a spirit of work and study.
Therefore, improving teacher performance is also a major task for school principals.In order for teacher performance to increase, it is necessary to have a program of activities held by school principals to support each teacher's performance competence.The principal has a very big role in the progress of teacher performance.Based on the data that has been obtained above, it can be seen that the leadership of the principal of SMK Negeri 8 Palembang has played a role in teacher performance.However, there are still some competencies that need to be improved and given more attention so that the principal's leadership role plays a very important role in teacher performance.Through this, the teacher's performance will automatically improve.
fifth hypothesis test indicate that the work discipline of teachers at SMK Negeri 8 Palembang has a positive and significant effect on teacher performance at SMK Negeri 8 Palembang.Teacher work discipline is needed by a teacher in carrying out his duties.Discipline is an operational function of human resource management.Discipline is the most important operative function because the better a teacher's discipline, the higher the work discipline that can be achieved.Work discipline can be interpreted as a form of obedience to a teacher's behavior in complying with certain rules and regulations related to work, without good discipline it will be very difficult for a school, especially SMK Negeri 8 Palembang to achieve optimal results.Good discipline is a reflection of the magnitude of a teacher's sense of responsibility for the tasks he receives.With a disciplined attitude will encourage work passion, to realize the school's goals in educating the nation's sons and daughters.
If we look at and compare the effect of the direct variable on the mediating variable, it can be seen by comparing the path coefficient between the direct effect without mediation and the multiplication of the path coefficient on the mediating variable.
In this study there are 2 effects of mediation that will be seen, respectively: The

Suggestion
Based on the conclusions generated in this study, the authors provide suggestions to several parties as follows: Suggestions for the principal of SMK Negeri 8 Palembang.
From the model built in this study, and from the results of hypothesis testing using Smart-PLS , it can be suggested to the principal of SMK Negeri 8 Palembang, for a performance improvement program.Of the 3 variables used to see the effect on performance, namely Interpersonal Communication, Leadership, and Work Discipline, all of them have a positive influence on performance.However, of the three variables, leadership improvement can be prioritized.Because of the 9 Leadership indicators, 1 indicator has a fairly high loading factor value, which is more than 0.9.

Suggestions for further research
It is hoped that further researchers can examine other variables on teacher performance in addition to these three variables to find the character and behavior of teachers at SMK Negeri 8 Palembang which have a significant positive effect on performance, and the results in this study are also very likely to be different for other focuses (variables). .

Limitations
There are many limitations in this study because the number of samples was only 60 people, namely all teachers of SMK Negeri 8 Palembang.Therefore, in order to obtain results that are in accordance with the theory, a larger sample can be used, and can also develop the model by adding or combining it with other variables.
Gambar 1. Framework of thinking

Figure 4
Figure 4.1 Full Model after calculating 1

Figure
Figure 4.1 Full Model Effect of Interpersonal Communication on Teacher Performance at SMK Negeri 8 Palembang.with work discipline as a mediating variable.a.The relationship between Interpersonal Communication and performance has a Path coefficient value of SMK Negeri 8 Palembang (P1) b.The relationship between interpersonal communication and work discipline has a path coefficient value of 0.998 (P2) c.The relationship between work discipline and performance has a path coefficient value of 0.630 (P3) Furthermore, compared to the path coefficient between the direct influence and the effect through the mediating variable, it is obtained as follows: Direct effect: P1 = 0.179 Effect through mediation: P2 * P3 = 0.998 * 0.630 = 0.628 It turns out that both produce different numbers, so it can be concluded that the work discipline variable can mediate the relationship between Interpersonal Communication and Teacher Performance at SMK Negeri 8 Palembang.The influence of leadership on teacher performance at SMK Negeri 8 Palembang.with work discipline as a mediating variable.a.The relationship between leadership and performance has a path coefficient value of 0.472 (P4).b.The relationship between leadership and work discipline has a path coefficient value of 0.397 (P5) c.The relationship between work discipline and performance has a path coefficient value of 0.630 (P3) Furthermore, compared to the path coefficient between direct influence and influence through mediation, it is obtained as follows: Direct effect : P4 = 0.472 Effect through mediation: P5 * P3 = 0.397 *0.630 = 0.250 It turns out that the path coefficient of a direct relationship is greater than the path coefficient with the mediating variable, so it can be concluded that the variables of Interpersonal Communication and Leadership can mediate the relationship between work discipline and teacher performance at SMK Negeri 8 Palembang.

Table 4 .
7 Loading Factor of Final Model Next, see the Composite Reliability and Cronbach Alpha values for each variable as shown in the table below:

Table 4 .
9 Table of R-square Dependent Variables

Table 4
Palembang.This is in accordance with the research of Siswoyo Haryono (2012) examining the influence of Interpersonal Communication, Attitude and Work Motivation on Work Discipline and Its Implications on the Performance of DPRD Secretariat Employees in South Sumatra Province.In his research, it was concluded that interpersonal communication partially had a positive and significant effect on the discipline of DPRD Secretariat employees in South Sumatra Province second hypothesis test, leadership has a significant positive effect on teacher work discipline at SMK Negeri 8 Palembang, this is shown by the results of the t-statistical test explaining that in this study leadership has a positive influence on discipline.Thus the results of this study develop the opinion of Sigit Wahyu Baskoro ( Nusantara Journal of Behavioral and Social Science, 1(4), 2022, -111 Furthermore, the conclusions on the mediating effect of the respective discipline and leadership variables are as follows: 1. Work discipline is a variable mediating the relationship of Interpersonal Communication on performance.So based on this conclusion, if the principal of SMK Negeri 8 Palembang intends to improve interpersonal communication to improve teacher performance, it is necessary to improve work discipline .2. Work discipline is a mediating variable of the relationship between leadership and performance.So based on this conclusion, if the principal of SMK Negeri 8 Palembang.intends to improve leadership so that performance increases, it is necessary to increase work discipline.