Psychologists in Kifisia

Ms. Krokidi Xrysa is a Psychologist - Psychotherapist and maintains her private practice in Kifisia. She holds a BSc in Psychology from London Metropolitan University and an MSc in Clinical Psychology (CBT focused) from Hellenic American University, and has completed her training at the Center for Training and Treatment of Eating Disorders (KEADD). Ms. Krokidi has completed further educational programs related to Clinical Psychology, Learning Difficulties, and training in Cognitive Behavioral Clinical Hypnotherapy, and has particular expertise in managing life changes in women during menopause. In her private practice, she handles a wide range of cases, always focusing on providing the best possible care tailored to the individual needs of each person who seeks her services.

H Παπαχριστοπούλου Αλεξία MPH, BSc είναι Ψυχολόγος - Σχεσιακή Ψυχαναλυτική Ψυχοθεραπεύτρια και διατηρεί ιδιωτικό γραφείο στην Κηφισιά. Είναι απόφοιτη του τμήματος Ψυχολογίας του University of Essex, ειδικευμένη στις Κλινικές Δεξιότητες με βάση τη Σχεσιακή Ψυχαναλυτική Ψυχοθεραπεία από το Ινστιτούτο Σχεσιακής & Ομαδικής Ψυχοθεραπείας (ΙΣΟΨ). Είναι εκπαιδευόμενη στην Ομαδική Ψυχοθεραπεία κατά Irvin Yalom και τα Σχεσιακά Δυναμικά της Ομάδος (ΙΣΟΨ) και κάτοχος Μεταπτυχιακού τίτλου στη Δημόσια Υγεία & Επιδημιολογία (MPH) της Ιατρικής Σχολής του Πανεπιστημίου Κρήτης. Στα πλαίσια της ομαδικής εκπαίδευσής της συν-συντονίζει θεραπευτική ομάδα από τον Σεπτέμβριο του 2023 στο Ινστιτούτο Σχεσιακής και Ομαδικής Ψυχοθεραπείας. Επιπλέον, είναι επιστημονική συνεργάτιδα του Κέντρου Ψυχοθεραπείας in – between στην Αθήνα, παρέχοντας ατομικές και ομαδικές συνεδρίες δια ζώσης και διαδικτυακά σε ενήλικες, εφήβους, ζεύγη και οικογένειες. Παράλληλα έχει συνεργαστεί με την Ευρωπαϊκή Υπηρεσία Ασύλου (European Union Agency for Asylum), παρέχοντας υποστήριξη στους αιτούντες Διεθνούς Προστασίας και σε άτομα που ανήκουν σε κοινωνικά ευάλωτους πληθυσμούς. Έχει λάβει μέρος σε ερευνητικό πρόγραμμα του Εθνικού Ινστιτούτου Υγείας των ΗΠΑ (NIH) σε θέματα υγείας που αφορούν στην Παιδική Παχυσαρκία, τη Διατροφική Συμπεριφορά και τη Γνωστική Λειτουργία των παιδιών και έχει συμμετάσχει ως συγγραφέας σε τρεις σχετικές δημοσιεύσεις σε επιστημονικά περιοδικά στο PubMed. Είναι μέλος της Διεθνούς Ένωσης Σχεσιακής Ψυχανάλυσης και Ψυχοθεραπείας (IARPP) και της Αμερικανικής Ένωσης Ομαδικής Ψυχοθεραπείας (AGPA).

Mpaloti Maria MA is a Psychologist - Psychotherapist with a private practice in the Kifisia area. She holds a degree in Psychology from Panteion University and postgraduate studies from the University of Nottingham, UK. She has specialized in the systemic approach, following extensive training at AKMA (Athens Center for the Study of Man). The Psychologist has participated in European conferences and has many years of experience in psychotherapy for adolescents and adults, as well as in group and family therapy.

Arxontia Kiaxagia is a Psychologist – Psychotherapist based in Athens and is a graduate of the University of Essex, holding a professional practice license. She provides therapy and support to adults and adolescents experiencing anxiety, depression, panic attacks, relationship difficulties, self-esteem issues, among others. Guided by scientific expertise and empathy, she creates an environment where individuals can feel safe, understood, and ready to discover their best selves.

Maria Prigkou is an experienced clinical psychologist with a strong academic background and diverse training in the field of mental health. She holds a Bachelor's Degree in Psychology from the *European University of Cyprus* and a Master's Degree in Clinical Psychology from the *University of Indianapolis*, where she gained solid theoretical knowledge and practical expertise.

Further deepening her specialization, she completed a Master's in Counseling with a focus on addiction at *Philips University*, enhancing her skills in treating individuals struggling with dependency-related behaviors. In 2025, she began advanced training in Psychoanalytic/Psychodynamic Psychotherapy for Adults and Adolescents at the *European Institute of Counseling & Psychotherapy*.

Her professional experience includes work in municipal health services, non-profit mental health organizations, and private practice. She focuses on psychosomatic symptoms, eating disorders, and various forms of addiction. Her therapeutic style is grounded in consistency, empathy, and a commitment to continuous personal and professional development, including regular supervision with members of the Hellenic Psychoanalytic Society.

In addition to individual therapy sessions, she organizes experiential psychoeducational workshops and continually enriches her practice through ongoing training and clinical engagement.

Skafidas Spyros BSc, MSc is a Psychologist - Psychotherapist and maintains a private practice in Kifisia. He holds a degree from the Department of Psychology at the University of Nicosia and a master's degree in Criminology from the same University. Additionally, he has attended a seminar on "Criminological Research: The Contribution of Psychology" at the National and Kapodistrian University of Athens, and he currently participates in the seminar "Anxiety and Depression: Psychoeducation and Management" at the same institution. He completed his internship at the Counseling Station "Agia Skepi" in Cyprus and was part of the Psychosocial Care Team at the Armored Training Center (KETTH) Avlona. Moreover, he provided psychological counseling support on the Armed Forces SOS 24-hour hotline at the 414 Military Hospital of Special Diseases (SNEN) and has worked as a Psychologist at the KDAP MEA Prosvasis. Currently, he is a Psychologist at the Day Care and Day Care Center for People with Disabilities "Nikodimos Graikos" of the Foundation for the Care of Persons with Intellectual Disabilities or Down Syndrome "Maria Kokkori".

Aleksopoulos Dimitris BSc, MSc is a Psychologist - Psychotherapist who maintains a private practice in Kifisia. He holds a degree from the Department of Psychology at the University of Crete. He possesses a Master's degree in "Psychology of Physical Education and Sports" from the University of Thessaly, while simultaneously receiving training in Cognitive and Behavioral Therapy (CBT) through the four-year program of the Society of Cognitive-Behavioral Studies (IEΘS). He has pursued further education in the School Psychology Program at the University of the Aegean and has specialized within the framework of Organizational Psychology in the postgraduate program "Human Resources Management and Organizational Analysis" at the National and Kapodistrian University of Athens. He has extensive collaboration with counseling structures and frameworks, where he provides individual psychotherapy and counseling services. Additionally, he cooperates with muscle-strengthening facilities, organizing seminars, events, and conferences focusing on the connection between mental health and sports. Concurrently, he collaborates with schools, delivering lectures addressed to educators, parents, and students on contemporary issues of the school community. In the past, he has worked with a social reintegration structure, providing psychotherapeutic support to formerly incarcerated individuals in their efforts toward social reintegration. His primary concern is empathy towards the client, active listening, understanding their needs, and the gradual establishment of a healthy therapeutic relationship founded on trust. Therefore, through guidance in techniques for managing emotions, thoughts, and behaviors, the aim is to promote the mental health and well-being of the client.

Pantazopoulou Xara is a Psychologist, licensed to practice professionally. She specializes in Counseling and Psychotherapy, both online and in person, having specialized in the Integrative Approach. She completed her postgraduate studies with an MA in Counselling & Psychotherapy, focusing on the Integrative Approach, and her undergraduate studies in Psychology (BSc, Hons, Psychology) at the University of East London, UK. She completed additional training at Aeginiteio Hospital in the 1st Psychiatric Clinic, specializing in Clinical Psychopathology. She has also volunteered as a trainee Psychologist at the General Hospital of Athens, Sismanogleio - Amalia Fleming, specifically at the Community Child and Adolescent Mental Health Center. Having initially studied at the National and Kapodistrian University of Athens, in the Department of Philosophy - Pedagogy and Psychology (majoring in Psychology), she has many years of experience in education as well as in counseling parents, children, and adolescents.

Kostis Panagiotis is a Psychologist – Psychotherapist with a private practice in Kifisia. He holds a professional license and has extensive experience in the psychological support of children, adolescents, and adults. His therapeutic approach combines elements of Cognitive Behavioral Therapy and Systemic Psychotherapy, emphasizing the individual as a member of their family and social environment.

He has worked for years in child protection and vulnerable population services, conducting both individual sessions and family support. Concurrently, he has experience in coordinating shelter facilities and managing mental health issues in vulnerable social groups.

He studied Psychology at the University of Hertfordshire and pursued postgraduate studies in Child Development (MSc in Psychology of Child Development) at the University of Central Lancashire. He has been trained in Cognitive Behavioral Therapy at the Center for Applied Psychotherapy and Counseling, while his systemic approach has been shaped through extensive training at the Athenian Center for the Study of Man.

Fagkountes - Papoudos Tzoulia is a Psychologist – Psychotherapist based in Kifisia, where she maintains a private practice, offering individual psychotherapy for adults as well as online sessions.

She holds a degree in Psychology from the University of East London and has completed postgraduate studies in Clinical Cognitive Neuropsychology at the University of Strasbourg. She has been trained in Systemic – Family Therapy and Child Psychology.

She specializes in the management of anxiety, depressive mood, interpersonal relationships, and parental counseling, emphasizing the understanding of patterns that affect emotional life and relationships.

She provides sessions at her office in Kifisia, conducts sessions in Mykonos during specific time periods, and also offers online psychotherapy, serving individuals from all over Greece and abroad.

Maria Arvanitaki is a school psychologist and the mother of three children.She studied Psychology at the Department of Psychology of the National and Kapodistrian University of Athens. Her interest in children and in strengthening their psychological resilience led her to pursue postgraduate studies in School Psychology, also at NKUA. At the same time, she began her training in Existential Systemic Psychotherapy at the Antistixi Institute.Her professional journey began during her undergraduate years, providing creative activity programs for children. Over the years, she has worked at the Municipal Health Clinics of the City of Athens offering psychological support services, in special therapy centers, private educational institutions, and on a voluntary basis at the Child and Adolescent Psychiatry Department of Attikon University Hospital, as well as in other public sector settings. Since 2016, she has been working in public education as a school psychologist, while also maintaining a private practice.In parallel, she has participated in annual training programs, including Child and Adolescent Psychopathology, Play Therapy, and Gestalt Psychotherapy.Her close work with children and families has led her to explore the conditions that promote psychological functioning and resilience, the development of self-esteem, as well as family interaction patterns that contribute to both functional and dysfunctional outcomes.The core of her therapeutic work is grounded in respect for the uniqueness of each individual, the recognition and enhancement of personal strengths beyond difficulties or dysfunctions, the assumption of personal responsibility, and the promotion of functional conditions that support psychological well-being and healthy relationships.

Maria Rapti is a Psychologist who has dedicated her professional career to psychology with a strong emphasis on Systemic Psychotherapy. Her studies began in 2009, and since then she has expanded her knowledge through specialized training and professional experience. Since 2024, she has been enrolled in a postgraduate program in Systemic Psychotherapy, while concurrently continuing her education at the Human Relations Laboratory. Previously, she completed a Bachelor of Science in Psychology (2020-2023), as well as studies in Counseling Psychology (2012-2014). Additionally, she holds an HND in Speech Therapy (2011-2012) and has completed a Foundation in Speech Therapy (2009). In her professional practice, since 2024 she has been providing online sessions and collaborating with a Neuropsychiatric Clinic, offering individual online psychotherapy. Prior to this, she completed an internship at the same clinic and worked with children with learning difficulties, providing counseling to parents. Her experience also includes internships at "Arogi" (KDAP-MEA), the "Exelixi" center with a focus on autism, as well as supporting bilingual children in an institution. She remains active in continuing professional development through seminars, including training on LGBTQ+ awareness and counseling issues, psychodrama, Art Therapy, and dramatherapy. Maria Rapti consistently seeks to develop her skills further in order to provide optimal support to her clients.

To nε͂ma είναι ένας σύγχρονος πολυδύναμος χώρος ψυχικής υγείας στην Κηφισιά, σχεδιασμένος ώστε να καλύπτει τις ανάγκες υποστήριξης σε ατομικό και ομαδικό επίπεδο. Επαγγελματίες ψυχικής υγείας με μακρά εμπειρία στην ψυχιατρική, την ψυχοθεραπεία και τη συμβουλευτική, μαζί με επαγγελματίες από άλλους κλάδους, συγκροτούν μια συνεκτική και εξειδικευμένη ομάδα που συνδυάζει γνώση, εμπειρία και επιστημονική υπευθυνότητα, προσφέροντας ουσιαστική υποστήριξη σε κάθε άνθρωπο. Ακολουθούν λίγα λόγια για την ομάδα:

Ελεάνα Παπαγεωργίου - Κλινική Ψυχολόγος, Ψυχοθεραπεύτρια ( Υπεύθυνη Θεραπευτικής Ομάδας)

Η Ελεάνα Παπαγεωργίου είναι κλινική ψυχολόγος και ψυχοθεραπεύτρια, απόφοιτη του Πανεπιστημίου Strasbourg I. Έχει εργαστεί (από το 1997) στο Τμήμα Εφήβων και Νέων του 18 Άνω του Ψυχιατρικού Νοσοκομείου Αττικής, στο Τμήμα Ψυχιατρικής Εφήβων και Νέων του Γενικού Νοσοκομείου Αθηνών «Γεώργιος Γεννηματάς», καθώς και στην Ψυχιατρική Κλινική Ενηλίκων του ίδιου νοσοκομείου. Στο έργο της περιλαμβάνεται επίσης η εκπαίδευση και εποπτεία ασκούμενων φοιτητών και νέων επαγγελματιών ψυχικής υγείας. Η κλινική της εργασία εστιάζει στην ατομική ψυχοθεραπεία, την ψυχαναλυτική ομαδική ψυχοθεραπεία και την ψυχοθεραπεία ζεύγους, στην ψυχοδιαγνωστική καθώς και στην λειτουργία εποπτικών ομάδων επαγγελματιών ψυχικής υγείας.

Λίνα Αργυράκη - Κλινική Ψυχολόγος - Ψυχοθεραπεύτρια

Είναι απόφοιτη Κλινικής Ψυχολογίας στο Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών, ενώ έχει ψυχοθεραπευτική εξειδίκευση στη Γνωσιακή- Συμπεριφορική θεραπεία από την Εταιρεία Γνωσιακών Συμπεριφοριστικών Σπουδών. Έχει εργαστεί σε σε ψυχιατρικά τμήματα, κέντρα ψυχικής υγείας και μονάδες διαταραχών μνήμης, όπου ανέλαβε ψυχοθεραπευτικές παρεμβάσεις και ψυχομετρικές αξιολογήσεις. Συνεργάζεται με ενήλικες, παιδιά- εφήβους και γηριατρικό πληθυσμό.

χιατρικές δομές και νοσοκομεία, καθώς και σε ιδιωτικό πλαίσιο.

Στέλλα Παλαιολόγου - Κλινική Ψυχολόγος

Κατέχει ειδίκευση στην Κλινική Ψυχοπαθολογία και Ψυχαναλυτική κατεύθυνση (Université Paul Valéry – Montpellier 3), ενώ, εχει εκπαιδευτεί στην κλινική αξιολόγηση και στη χρήση προβολικών μεθόδων καθώς και στην στην Κλινική του Εφήβου (DU Clinique de l’adolescent, Université Paris Cité). Εργάζεται ψυχοθεραπευτικά με ενήλικες και εφήβους.

Γεωργία Πασά - Ψυχολόγος – Ψυχοθεραπεύτρια

Ολοκλήρωσε τις σπουδές της ως Ψυχολόγος στο Τμήμα Ψυχολογίας του Εθνικού Καποδιστριακού Πανεπιστημίου Αθηνών, με ειδίκευση στη ψυχαναλυτική θεωρία και στη θεωρία των αντικειμενοτρόπων σχέσεων, καθώς και στις θεωρητικές-θεραπευτικές τεχνικές που αναπτύχθηκαν στο χώρο της ψυχοδυναμικής ψυχοθεραπείας, καθώς και στην Ομαδική, Οικογενειακή Θεραπεία και στη Θεραπεία Ζεύγους.

Μανώλης Τσαγκαράκης - Ψυχολόγος

Κατέχει ειδίκευση στην Κλινική Ψυχολογία, ενώ είναι πτυχιούχος Φυσικής. Έχει εκπαιδευτεί στην Κλινική Ψυχοπαθολογία (ΕΠΙΨΥ (Ερευνητικό Πανεπιστημιακό Ινστιτούτο Ψυχικής Υγιεινής) και του Αιγινητείου Νοσοκομείου (Γ.Ν.Α.) και στην Ψυχική Υγεία Εφήβων (Γενικό Νοσοκομείο Αθηνών «Γεώργιος Γεννηματάς») ενώ έχει ολοκληρώσει και τις διετείς εκπαιδεύσεις της Ελληνικής Ψυχαναλυτικής Εταιρείας (ΕΨΕ) και της Ελληνικής Ψυχοσωματικής Εταιρείας (ΕΨΣΕ). Από το 2022 εργάζεται ως Σχολικός Ψυχολόγος στη δευτεροβάθμια εκπαίδευση του Δήμου Αθηναίων ενώ επιτελεί ερευνητικό έργο σε συνεργασία με πανεπιστημιακούς φορείς σε τομείς όπως η ψυχοσωματική εφήβων, οι διαταραχές προσωπικότητας και το πένθος.

Γιώργος Τσιρίτας - Ειδ. Ψυχιατρικής , Σύμβουλος Ψυχικής Υγείας,Ψυχοθεραπευτής

Είναι Eιδικευόμενος Ψυχίατρος Ενηλίκων και Ψυχοθεραπευτής. Έχει εκπαιδευτεί στη Γνωστική-Αναλυτική (Ψυχαναλυτική) Ψυχοθεραπεία (CAT), ατομική ψυχοθεραπεία που εστιάζει σε στάσεις και ρόλους εδραιωμένους στο παρελθόν που συντελούν σε ψυχικές δυσκολίες στο σήμερα. Έχει κλινική εμπειρία σε επείγοντα ψυχιατρικά περιστατικά και Διασυνδετική Ψυχιατρική, και έχει παρακολουθήσει σεμινάρια, συνέδρια και ημερίδες της Ελληνικής Ψυχαναλυτικής Εταιρείας.

Έυη Φεύγα – Λογοπεδικός, Ψυχολόγος, BSc(hns) Speech Sciences , University College London, Mentalization Based Therapy - Anna Freud Institute Londonreg. Health Professions Council

Είναι λογοπεδικός – ψυχολόγος. Κατέχει πτυχίο Bachelor of Science Honors στις Επιστήμες Λόγου από το University College London και πτυχίο Bachelor of Science στην Ψυχολογία από το University of Central Lancashire. Επιπλέον, έχει εκπαιδευτεί στη Θεραπεία Mentalization-Based Therapy για Εφήβους και Οικογένειες από το Anna Freud Centre London, καθώς και στην Θεραπεία Αλληλεπίδρασης Γονέα-Παιδιού για παιδιά προσχολικής ηλικίας που τραυλίζουν από το Michael Palin Centre NHS – Islington. Δουλεύει με παιδιά, εφήβους και γονείς από το 1998.

Koutsaftiki Katerina is a licensed Psychologist – Psychotherapist, holder of a Psychology Degree with honors from the University of Greenwich, and maintains a private practice in Kifisia. She is a certified Systemic Psychotherapist from Logo Psychis – Institute of Training and Research in Systemic Psychotherapy, having completed the four-year Clinical Specialization Program SANE (System Attachment Narrative Encephalon), which integrates attachment theory, principles of narrative psychology, and contemporary findings in neuroscience. Additionally, she has attended the one-year Specialization Program in Couples Therapy and the one-year Specialization Program in Trauma Management offered at “Logo Psychis.” Lastly, she completed the Specialization program in Systemic Counseling from the Laboratory for the Exploration of Human Relations and holds an MBA from the Athens University of Economics and Business (AUEB) in Human Resource Management. She has taught at colleges in the field of Research Methods and Data Analysis in Applied Sciences (Psychology, etc.), and has conducted and coordinated experiential psychology seminars on self-awareness, boundaries, and interpersonal relationship management. She practices privately, providing in-person and online psychotherapy and counseling sessions for adults, couples, and parents, in both Greek & English. She specializes in interpersonal relationship issues, self-improvement and self-confidence enhancement, intra-family relationships, emotional difficulties, anxiety, occupational stress, as well as sexual orientation issues. Finally, she is a member of the British Psychological Society.

Maria Aggeliki Rapti is a Psychologist-Psychotherapist. She graduated with honors from the Department of Psychology at Panteion University of Social and Political Sciences and is completing her postgraduate studies at the same university.

Simultaneously, she is completing her studies in the 4-year International Postgraduate Program in Counseling and Psychotherapy: Systemic-Narrative Approach (theoretical and practical training with supervision) at KEDIVIM – National and Kapodistrian University of Athens (under the direction of Professor F. Isari).

She is also certified in the administration, scoring, and interpretation of the psychometric instrument "Minnesota Multiphasic Personality Inventory®-2 (MMPI®-2)."

She continuously enriches her knowledge by participating in specialized conferences and workshops for mental health professionals, focusing on interventions across all age groups.

Through psychotherapy, Maria aims to establish a therapeutic relationship in which participants collaboratively shape therapy goals, recognize difficulties and strengths, and work together toward empowerment, improved quality of life, and the development of more functional ways of thinking, feeling, and relating. The therapeutic relationship constitutes a space of meaningful connection where change can emerge safely and with respect for each individual’s pace and needs.

She undertakes psychotherapy for adults. Sessions are conducted online.

Zarogkika Lina is a Psychologist specializing in Counseling Psychology and Psychotherapy. She holds a Master's degree in Counseling Psychology from London Metropolitan University and a Bachelor's degree in Psychology from the University of East London. Her studies, combined with her clinical experience, have equipped her with a deep understanding of human emotions and behaviors. Her therapeutic approach is based on Cognitive-Behavioral Therapy (CBT), while also employing an integrative model utilizing tools from systemic, psychodynamic, gestalt, mindfulness, and other modalities. She has been trained and specializes in couples therapy, eating disorder treatment, clinical psychology, sexual education, anxiety, as well as other areas and approaches within the field. With experience in mental health settings and participation in scientific research projects, her aim is to provide practical and meaningful solutions. She focuses on the uniqueness of each individual and creates a safe and supportive environment to help clients address their challenges. Through empathy and contemporary therapeutic methods, she assists in redefining issues for a more functional and balanced daily life. A crucial component of all the above is the establishment of a therapeutic alliance with trust as its fundamental element.

Mpardaka Semeli MSc, MA is a Psychologist, Integrative Systemic Psychotherapist, as well as a Career Counseling Advisor. She is a graduate of the Psychology Department of the University of Strasbourg. She holds a postgraduate diploma in Counseling, Career Guidance, and Lifelong Learning from the National and Kapodistrian University of Athens. Additionally, she has specialized at the National and Kapodistrian University of Athens in Clinical Social Psychology of Addictions, Cognitive-Behavioral Therapy, and Art Therapy. She has also been trained in Emotionally Focused Therapy (EFT) by the EFT Greek Network, as well as Compassion-Focused Therapy. She has attended seminar series and has participated as a speaker in conferences. She completed her supervised internship at the company CVexperts as a career counselor and at the service center for people with disabilities "To Ergastiri – Lilian Voudouri" as a psychologist. Furthermore, she collaborates with the psychosocial services center Amphiaraos, Child and Family, where she handles a wide range of cases. Lastly, she maintains her private practice in Kifisia and Peristeri, providing individual psychotherapy, parent and family counseling, couples counseling, as well as career counseling services.

Gkaravela Rafaela is a Psychologist - Psychotherapist and maintains a private practice in Kifisia. She is a graduate of the University of Nicosia with a Bachelor of Science (BSc) degree in Psychology and has additional studies in Human Resource Management (HRM) from the National and Kapodistrian University of Athens. She has specialized in Cognitive Behavioral Psychotherapy at the Center for Applied Psychotherapy and Counseling, and has attended training programs on topics such as panic attack management, human loss, grief, and loneliness. She has experience as a private psychologist with an office in Kifisia and has also worked at a Supported Living Day Center for People with Disabilities, providing psychological support and individualized interventions. Additionally, she has served as a human resources consultant for the company PULSO GR, specializing in occupational stress management and enhancing mental resilience in the workplace.